story: [Otto] and her sister [Crystal] decided to take a trip to Mexico together. [Preston] and his brother [Paul] both played soccer. [Preston] was faster, but [Paul] had a better shot, so they complemented each other well. [Preston] often goes out for lunch with his sister, [Crystal].
query: ('Preston', 'Otto')
clean_story: [Preston] often goes out for lunch with his sister, [Crystal]. [Otto] and her sister [Crystal] decided to take a trip to Mexico together.
proof_state: [{('Preston', 'brother', 'Otto'): [('Preston', 'sister', 'Crystal'), ('Crystal', 'brother', 'Otto')]}]