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: Robert Holloway, David Curtis, Craig Giles, David Williams, Chelsea Ramos, Krista Gonzalez, Heather Chen.
- Fiendship connections: Robert Holloway and Craig Giles, Robert Holloway and David Curtis, Robert Holloway and Heather Chen, Robert Holloway and Chelsea Ramos, Robert Holloway and Krista Gonzalez, David Curtis and Heather Chen, David Curtis and Krista Gonzalez, Craig Giles and Chelsea Ramos, Craig Giles and Krista Gonzalez, David Williams and Krista Gonzalez, Chelsea Ramos and Krista Gonzalez, Krista Gonzalez and Heather Chen.
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": "Robert Holloway", "id": 2470983}, {"name": "David Curtis", "id": 2454729}, {"name": "Craig Giles", "id": 2422155}, {"name": "David Williams", "id": 2428493}, {"name": "Chelsea Ramos", "id": 2493619}, {"name": "Krista Gonzalez", "id": 3179640}, {"name": "Heather Chen", "id": 2460252}], "links": [{"source": 2470983, "target": 2422155}, {"source": 2470983, "target": 2454729}, {"source": 2470983, "target": 2460252}, {"source": 2470983, "target": 2493619}, {"source": 2470983, "target": 3179640}, {"source": 2454729, "target": 2460252}, {"source": 2454729, "target": 3179640}, {"source": 2422155, "target": 2493619}, {"source": 2422155, "target": 3179640}, {"source": 2428493, "target": 3179640}, {"source": 2493619, "target": 3179640}, {"source": 3179640, "target": 2460252}]}
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: Robert Holloway, David Curtis, Craig Giles, David Williams, Chelsea Ramos, Krista Gonzalez, Heather Chen.
- Fiendship connections: Robert Holloway and Craig Giles, Robert Holloway and David Curtis, Robert Holloway and Heather Chen, Robert Holloway and Chelsea Ramos, Robert Holloway and Krista Gonzalez, David Curtis and Heather Chen, David Curtis and Krista Gonzalez, Craig Giles and Chelsea Ramos, Craig Giles and Krista Gonzalez, David Williams and Krista Gonzalez, Chelsea Ramos and Krista Gonzalez, Krista Gonzalez and Heather Chen.
Identify the Minimum Vertex Cover of this network and present your answer in the following format: [UserA, UserB, UserC, UserD, ...].
test