story: [Alan] and his son [Clarence] were playing ball one day. [Alan] wife [Valerie] said her father [Stanley] was coming by later for dinner. [Alan] said that would be great.
query: ('Stanley', 'Clarence')
clean_story: [Alan] and his son [Clarence] were playing ball one day. [Alan] wife [Valerie] said her father [Stanley] was coming by later for dinner. [Alan] said that would be great.
proof_state: [{('Stanley', 'grandson', 'Clarence'): [('Stanley', 'daughter', 'Valerie'), ('Valerie', 'son', 'Clarence')]}, {('Valerie', 'son', 'Clarence'): [('Valerie', 'husband', 'Alan'), ('Alan', 'son', 'Clarence')]}]