You are a helpful assistant. The assistant first thinks about the reasoning process in the mind and then provides the user with the answer. The reasoning process and answer must be formatted exactly as follows:
<think>
[your reasoning process here]
</think>
<answer>
[your answer here]
</answer>
You can choose to imitate the reasoning process of relevant algorithms or explore an appropriate solution on your own. DO NOT use code, and remember to focus on the logical flow.
system
Your task is to solve the Minimum Vertex Cover problem in the given social network. In this network, each node represents a user, and each edge represents a friendship connection. You need to identify the smallest subset of users such that every friendship connection has at least one user from this subset.

**Problem to Solve**

- Users in the network: Michael Hart, Patricia Harvey, Dustin Johnson, Mr. Raymond Elliott, Kara Hill, Paula Griffin, Katelyn Lynn, Anthony Wood, Denise Collins, Joseph Martinez, Sharon Harris, Keith Lee, Marcus Brown, Natasha White, Heidi Marshall, Phillip Hall, Max Ford, Karen Wright DVM, David Steele MD, Lisa Morris, Brooke King, Tanya Mcknight, Mark Robinson, Laura Sanchez, Christina Hurley, Alexander Nixon, Angela Evans.
- Fiendship connections: Michael Hart and Paula Griffin, Michael Hart and Denise Collins, Michael Hart and Joseph Martinez, Michael Hart and Lisa Morris, Patricia Harvey and Christina Hurley, Patricia Harvey and Denise Collins, Patricia Harvey and Mark Robinson, Dustin Johnson and Christina Hurley, Dustin Johnson and Denise Collins, Dustin Johnson and Sharon Harris, Dustin Johnson and Laura Sanchez, Dustin Johnson and Marcus Brown, Dustin Johnson and David Steele MD, Mr. Raymond Elliott and Anthony Wood, Mr. Raymond Elliott and Denise Collins, Mr. Raymond Elliott and Sharon Harris, Kara Hill and Denise Collins, Paula Griffin and Denise Collins, Paula Griffin and Lisa Morris, Katelyn Lynn and Denise Collins, Katelyn Lynn and Laura Sanchez, Katelyn Lynn and Sharon Harris, Anthony Wood and Keith Lee, Anthony Wood and Denise Collins, Anthony Wood and Sharon Harris, Denise Collins and Keith Lee, Denise Collins and Christina Hurley, Denise Collins and Phillip Hall, Denise Collins and Natasha White, Denise Collins and Angela Evans, Denise Collins and Heidi Marshall, Denise Collins and Laura Sanchez, Denise Collins and Joseph Martinez, Denise Collins and Mark Robinson, Denise Collins and Sharon Harris, Denise Collins and Lisa Morris, Denise Collins and Marcus Brown, Denise Collins and David Steele MD, Denise Collins and Alexander Nixon, Denise Collins and Tanya Mcknight, Denise Collins and Karen Wright DVM, Denise Collins and Max Ford, Denise Collins and Brooke King, Sharon Harris and Keith Lee, Sharon Harris and Christina Hurley, Sharon Harris and Angela Evans, Sharon Harris and Mark Robinson, Sharon Harris and Max Ford, Sharon Harris and Brooke King, Keith Lee and Tanya Mcknight, Marcus Brown and Christina Hurley, Marcus Brown and Mark Robinson, Karen Wright DVM and Christina Hurley, Karen Wright DVM and Laura Sanchez, Karen Wright DVM and Mark Robinson, David Steele MD and Christina Hurley, Brooke King and Christina Hurley, Mark Robinson and Christina Hurley, Laura Sanchez and Christina Hurley, Christina Hurley and Angela Evans.
Identify the Minimum Vertex Cover of this network and present your answer in the following format: [UserA, UserB, UserC, UserD, ...].
user
{"directed": false, "multigraph": false, "graph": {}, "nodes": [{"name": "Michael Hart", "id": 875778}, {"name": "Patricia Harvey", "id": 1383557}, {"name": "Dustin Johnson", "id": 1682316}, {"name": "Mr. Raymond Elliott", "id": 1203983}, {"name": "Kara Hill", "id": 1554449}, {"name": "Paula Griffin", "id": 807196}, {"name": "Katelyn Lynn", "id": 1041053}, {"name": "Anthony Wood", "id": 976032}, {"name": "Denise Collins", "id": 1066662}, {"name": "Joseph Martinez", "id": 1106602}, {"name": "Sharon Harris", "id": 1095980}, {"name": "Keith Lee", "id": 790709}, {"name": "Marcus Brown", "id": 1220411}, {"name": "Natasha White", "id": 910780}, {"name": "Heidi Marshall", "id": 1020997}, {"name": "Phillip Hall", "id": 863945}, {"name": "Max Ford", "id": 1318347}, {"name": "Karen Wright DVM", "id": 1496147}, {"name": "David Steele MD", "id": 1597269}, {"name": "Lisa Morris", "id": 1220442}, {"name": "Brooke King", "id": 1584986}, {"name": "Tanya Mcknight", "id": 1675612}, {"name": "Mark Robinson", "id": 1161437}, {"name": "Laura Sanchez", "id": 1108202}, {"name": "Christina Hurley", "id": 843633}, {"name": "Alexander Nixon", "id": 1655795}, {"name": "Angela Evans", "id": 975477}], "links": [{"source": 875778, "target": 807196}, {"source": 875778, "target": 1066662}, {"source": 875778, "target": 1106602}, {"source": 875778, "target": 1220442}, {"source": 1383557, "target": 843633}, {"source": 1383557, "target": 1066662}, {"source": 1383557, "target": 1161437}, {"source": 1682316, "target": 843633}, {"source": 1682316, "target": 1066662}, {"source": 1682316, "target": 1095980}, {"source": 1682316, "target": 1108202}, {"source": 1682316, "target": 1220411}, {"source": 1682316, "target": 1597269}, {"source": 1203983, "target": 976032}, {"source": 1203983, "target": 1066662}, {"source": 1203983, "target": 1095980}, {"source": 1554449, "target": 1066662}, {"source": 807196, "target": 1066662}, {"source": 807196, "target": 1220442}, {"source": 1041053, "target": 1066662}, {"source": 1041053, "target": 1108202}, {"source": 1041053, "target": 1095980}, {"source": 976032, "target": 790709}, {"source": 976032, "target": 1066662}, {"source": 976032, "target": 1095980}, {"source": 1066662, "target": 790709}, {"source": 1066662, "target": 843633}, {"source": 1066662, "target": 863945}, {"source": 1066662, "target": 910780}, {"source": 1066662, "target": 975477}, {"source": 1066662, "target": 1020997}, {"source": 1066662, "target": 1108202}, {"source": 1066662, "target": 1106602}, {"source": 1066662, "target": 1161437}, {"source": 1066662, "target": 1095980}, {"source": 1066662, "target": 1220442}, {"source": 1066662, "target": 1220411}, {"source": 1066662, "target": 1597269}, {"source": 1066662, "target": 1655795}, {"source": 1066662, "target": 1675612}, {"source": 1066662, "target": 1496147}, {"source": 1066662, "target": 1318347}, {"source": 1066662, "target": 1584986}, {"source": 1095980, "target": 790709}, {"source": 1095980, "target": 843633}, {"source": 1095980, "target": 975477}, {"source": 1095980, "target": 1161437}, {"source": 1095980, "target": 1318347}, {"source": 1095980, "target": 1584986}, {"source": 790709, "target": 1675612}, {"source": 1220411, "target": 843633}, {"source": 1220411, "target": 1161437}, {"source": 1496147, "target": 843633}, {"source": 1496147, "target": 1108202}, {"source": 1496147, "target": 1161437}, {"source": 1597269, "target": 843633}, {"source": 1584986, "target": 843633}, {"source": 1161437, "target": 843633}, {"source": 1108202, "target": 843633}, {"source": 843633, "target": 975477}]}
Your task is to solve the Minimum Vertex Cover problem in the given social network. In this network, each node represents a user, and each edge represents a friendship connection. You need to identify the smallest subset of users such that every friendship connection has at least one user from this subset.

**Problem to Solve**

- Users in the network: Michael Hart, Patricia Harvey, Dustin Johnson, Mr. Raymond Elliott, Kara Hill, Paula Griffin, Katelyn Lynn, Anthony Wood, Denise Collins, Joseph Martinez, Sharon Harris, Keith Lee, Marcus Brown, Natasha White, Heidi Marshall, Phillip Hall, Max Ford, Karen Wright DVM, David Steele MD, Lisa Morris, Brooke King, Tanya Mcknight, Mark Robinson, Laura Sanchez, Christina Hurley, Alexander Nixon, Angela Evans.
- Fiendship connections: Michael Hart and Paula Griffin, Michael Hart and Denise Collins, Michael Hart and Joseph Martinez, Michael Hart and Lisa Morris, Patricia Harvey and Christina Hurley, Patricia Harvey and Denise Collins, Patricia Harvey and Mark Robinson, Dustin Johnson and Christina Hurley, Dustin Johnson and Denise Collins, Dustin Johnson and Sharon Harris, Dustin Johnson and Laura Sanchez, Dustin Johnson and Marcus Brown, Dustin Johnson and David Steele MD, Mr. Raymond Elliott and Anthony Wood, Mr. Raymond Elliott and Denise Collins, Mr. Raymond Elliott and Sharon Harris, Kara Hill and Denise Collins, Paula Griffin and Denise Collins, Paula Griffin and Lisa Morris, Katelyn Lynn and Denise Collins, Katelyn Lynn and Laura Sanchez, Katelyn Lynn and Sharon Harris, Anthony Wood and Keith Lee, Anthony Wood and Denise Collins, Anthony Wood and Sharon Harris, Denise Collins and Keith Lee, Denise Collins and Christina Hurley, Denise Collins and Phillip Hall, Denise Collins and Natasha White, Denise Collins and Angela Evans, Denise Collins and Heidi Marshall, Denise Collins and Laura Sanchez, Denise Collins and Joseph Martinez, Denise Collins and Mark Robinson, Denise Collins and Sharon Harris, Denise Collins and Lisa Morris, Denise Collins and Marcus Brown, Denise Collins and David Steele MD, Denise Collins and Alexander Nixon, Denise Collins and Tanya Mcknight, Denise Collins and Karen Wright DVM, Denise Collins and Max Ford, Denise Collins and Brooke King, Sharon Harris and Keith Lee, Sharon Harris and Christina Hurley, Sharon Harris and Angela Evans, Sharon Harris and Mark Robinson, Sharon Harris and Max Ford, Sharon Harris and Brooke King, Keith Lee and Tanya Mcknight, Marcus Brown and Christina Hurley, Marcus Brown and Mark Robinson, Karen Wright DVM and Christina Hurley, Karen Wright DVM and Laura Sanchez, Karen Wright DVM and Mark Robinson, David Steele MD and Christina Hurley, Brooke King and Christina Hurley, Mark Robinson and Christina Hurley, Laura Sanchez and Christina Hurley, Christina Hurley and Angela Evans.
Identify the Minimum Vertex Cover of this network and present your answer in the following format: [UserA, UserB, UserC, UserD, ...].
test