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: Nancy Lawson, Sarah Smith, Brian Thompson, Mark Mathis, David Gallagher, Damon Rogers, Martin Smith, Nicole Novak, Paul Williams, Sabrina Garcia, Mackenzie White, Michele Willis, Terry Pena, Greg Payne, Robert Mendoza, Nicholas Griffin, Judith Johnston, Ryan Smith, Raymond May.
- Fiendship connections: Nancy Lawson and Raymond May, Sarah Smith and Martin Smith, Sarah Smith and Sabrina Garcia, Brian Thompson and Sabrina Garcia, Mark Mathis and Nicole Novak, Mark Mathis and Raymond May, David Gallagher and Sabrina Garcia, Damon Rogers and Martin Smith, Damon Rogers and Sabrina Garcia, Damon Rogers and Greg Payne, Paul Williams and Raymond May, Sabrina Garcia and Greg Payne, Sabrina Garcia and Judith Johnston, Mackenzie White and Raymond May, Michele Willis and Raymond May, Terry Pena and Raymond May, Robert Mendoza and Raymond May, Nicholas Griffin and Raymond May, Judith Johnston and Raymond May, Ryan Smith and Raymond May.
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": "Nancy Lawson", "id": 5021057}, {"name": "Sarah Smith", "id": 5105412}, {"name": "Brian Thompson", "id": 5943432}, {"name": "Mark Mathis", "id": 4945418}, {"name": "David Gallagher", "id": 5986828}, {"name": "Damon Rogers", "id": 5045263}, {"name": "Martin Smith", "id": 4947856}, {"name": "Nicole Novak", "id": 5417119}, {"name": "Paul Williams", "id": 5555903}, {"name": "Sabrina Garcia", "id": 4997206}, {"name": "Terry Pena", "id": 5005660}, {"name": "Greg Payne", "id": 5020765}, {"name": "Mackenzie White", "id": 5944412}, {"name": "Michele Willis", "id": 5944413}, {"name": "Robert Mendoza", "id": 4936288}, {"name": "Nicholas Griffin", "id": 5944422}, {"name": "Judith Johnston", "id": 5944426}, {"name": "Ryan Smith", "id": 4948334}, {"name": "Raymond May", "id": 5115646}], "links": [{"source": 5021057, "target": 5115646}, {"source": 5105412, "target": 4947856}, {"source": 5105412, "target": 4997206}, {"source": 5943432, "target": 4997206}, {"source": 4945418, "target": 5417119}, {"source": 4945418, "target": 5115646}, {"source": 5986828, "target": 4997206}, {"source": 5045263, "target": 4947856}, {"source": 5045263, "target": 4997206}, {"source": 5045263, "target": 5020765}, {"source": 5555903, "target": 5115646}, {"source": 4997206, "target": 5020765}, {"source": 4997206, "target": 5944426}, {"source": 5005660, "target": 5115646}, {"source": 5944412, "target": 5115646}, {"source": 5944413, "target": 5115646}, {"source": 4936288, "target": 5115646}, {"source": 5944422, "target": 5115646}, {"source": 5944426, "target": 5115646}, {"source": 4948334, "target": 5115646}]}
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: Nancy Lawson, Sarah Smith, Brian Thompson, Mark Mathis, David Gallagher, Damon Rogers, Martin Smith, Nicole Novak, Paul Williams, Sabrina Garcia, Mackenzie White, Michele Willis, Terry Pena, Greg Payne, Robert Mendoza, Nicholas Griffin, Judith Johnston, Ryan Smith, Raymond May.
- Fiendship connections: Nancy Lawson and Raymond May, Sarah Smith and Martin Smith, Sarah Smith and Sabrina Garcia, Brian Thompson and Sabrina Garcia, Mark Mathis and Nicole Novak, Mark Mathis and Raymond May, David Gallagher and Sabrina Garcia, Damon Rogers and Martin Smith, Damon Rogers and Sabrina Garcia, Damon Rogers and Greg Payne, Paul Williams and Raymond May, Sabrina Garcia and Greg Payne, Sabrina Garcia and Judith Johnston, Mackenzie White and Raymond May, Michele Willis and Raymond May, Terry Pena and Raymond May, Robert Mendoza and Raymond May, Nicholas Griffin and Raymond May, Judith Johnston and Raymond May, Ryan Smith and Raymond May.
Identify the Minimum Vertex Cover of this network and present your answer in the following format: [UserA, UserB, UserC, UserD, ...].
test