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: Stacey Guerra, Joseph Hall, Alec Odonnell, Angela Parker, Matthew Sandoval, Stephanie Taylor, Lauren Morrison.
- Fiendship connections: Stacey Guerra and Stephanie Taylor, Stacey Guerra and Lauren Morrison, Joseph Hall and Stephanie Taylor, Alec Odonnell and Matthew Sandoval, Alec Odonnell and Stephanie Taylor, Angela Parker and Stephanie Taylor, Matthew Sandoval and Stephanie Taylor, Stephanie Taylor and Lauren Morrison.
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": "Stacey Guerra", "id": 816416}, {"name": "Joseph Hall", "id": 818113}, {"name": "Alec Odonnell", "id": 793767}, {"name": "Angela Parker", "id": 821714}, {"name": "Matthew Sandoval", "id": 813555}, {"name": "Stephanie Taylor", "id": 816406}, {"name": "Lauren Morrison", "id": 816414}], "links": [{"source": 816416, "target": 816406}, {"source": 816416, "target": 816414}, {"source": 818113, "target": 816406}, {"source": 793767, "target": 813555}, {"source": 793767, "target": 816406}, {"source": 821714, "target": 816406}, {"source": 813555, "target": 816406}, {"source": 816406, "target": 816414}]}
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: Stacey Guerra, Joseph Hall, Alec Odonnell, Angela Parker, Matthew Sandoval, Stephanie Taylor, Lauren Morrison.
- Fiendship connections: Stacey Guerra and Stephanie Taylor, Stacey Guerra and Lauren Morrison, Joseph Hall and Stephanie Taylor, Alec Odonnell and Matthew Sandoval, Alec Odonnell and Stephanie Taylor, Angela Parker and Stephanie Taylor, Matthew Sandoval and Stephanie Taylor, Stephanie Taylor and Lauren Morrison.
Identify the Minimum Vertex Cover of this network and present your answer in the following format: [UserA, UserB, UserC, UserD, ...].
test