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: Richard Clay, Casey Hicks, Andrew Brown, Renee Clark, Crystal Barrett, Stephanie Wilkins, Kristine Valentine, Julie Foley, Pamela Adkins, Debra Santiago, William Johns, John Pope, Samantha Stone, Ashley Shaw, Kenneth Carter, Ann Rodriguez.
- Fiendship connections: Richard Clay and Crystal Barrett, Richard Clay and Pamela Adkins, Casey Hicks and Kristine Valentine, Casey Hicks and Crystal Barrett, Andrew Brown and Crystal Barrett, Renee Clark and Crystal Barrett, Renee Clark and William Johns, Crystal Barrett and Ann Rodriguez, Crystal Barrett and John Pope, Crystal Barrett and Kristine Valentine, Crystal Barrett and William Johns, Crystal Barrett and Pamela Adkins, Crystal Barrett and Julie Foley, Crystal Barrett and Stephanie Wilkins, Crystal Barrett and Ashley Shaw, Crystal Barrett and Kenneth Carter, Crystal Barrett and Debra Santiago, Crystal Barrett and Samantha Stone, Julie Foley and Ann Rodriguez, Julie Foley and John Pope, Julie Foley and Ashley Shaw, Ashley Shaw and Ann Rodriguez.
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": "Richard Clay", "id": 16166}, {"name": "Casey Hicks", "id": 185767}, {"name": "Andrew Brown", "id": 149480}, {"name": "Renee Clark", "id": 85128}, {"name": "Crystal Barrett", "id": 82378}, {"name": "Stephanie Wilkins", "id": 132331}, {"name": "Kristine Valentine", "id": 65006}, {"name": "Julie Foley", "id": 162257}, {"name": "Pamela Adkins", "id": 312529}, {"name": "Debra Santiago", "id": 353363}, {"name": "William Johns", "id": 147253}, {"name": "John Pope", "id": 13590}, {"name": "Samantha Stone", "id": 448762}, {"name": "Ashley Shaw", "id": 84540}, {"name": "Kenneth Carter", "id": 93118}, {"name": "Ann Rodriguez", "id": 12351}], "links": [{"source": 16166, "target": 82378}, {"source": 16166, "target": 312529}, {"source": 185767, "target": 65006}, {"source": 185767, "target": 82378}, {"source": 149480, "target": 82378}, {"source": 85128, "target": 82378}, {"source": 85128, "target": 147253}, {"source": 82378, "target": 12351}, {"source": 82378, "target": 13590}, {"source": 82378, "target": 65006}, {"source": 82378, "target": 147253}, {"source": 82378, "target": 312529}, {"source": 82378, "target": 162257}, {"source": 82378, "target": 132331}, {"source": 82378, "target": 84540}, {"source": 82378, "target": 93118}, {"source": 82378, "target": 353363}, {"source": 82378, "target": 448762}, {"source": 162257, "target": 12351}, {"source": 162257, "target": 13590}, {"source": 162257, "target": 84540}, {"source": 84540, "target": 12351}]}
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: Richard Clay, Casey Hicks, Andrew Brown, Renee Clark, Crystal Barrett, Stephanie Wilkins, Kristine Valentine, Julie Foley, Pamela Adkins, Debra Santiago, William Johns, John Pope, Samantha Stone, Ashley Shaw, Kenneth Carter, Ann Rodriguez.
- Fiendship connections: Richard Clay and Crystal Barrett, Richard Clay and Pamela Adkins, Casey Hicks and Kristine Valentine, Casey Hicks and Crystal Barrett, Andrew Brown and Crystal Barrett, Renee Clark and Crystal Barrett, Renee Clark and William Johns, Crystal Barrett and Ann Rodriguez, Crystal Barrett and John Pope, Crystal Barrett and Kristine Valentine, Crystal Barrett and William Johns, Crystal Barrett and Pamela Adkins, Crystal Barrett and Julie Foley, Crystal Barrett and Stephanie Wilkins, Crystal Barrett and Ashley Shaw, Crystal Barrett and Kenneth Carter, Crystal Barrett and Debra Santiago, Crystal Barrett and Samantha Stone, Julie Foley and Ann Rodriguez, Julie Foley and John Pope, Julie Foley and Ashley Shaw, Ashley Shaw and Ann Rodriguez.
Identify the Minimum Vertex Cover of this network and present your answer in the following format: [UserA, UserB, UserC, UserD, ...].
test