story: [Paul] and his son, [Leo], went to the store. [Nancy], [Paul]'s wife, wanted them to pick up stuff for dinner. [Paul] loved teaching his son, [Robert], baseball.
query: ('Nancy', 'Leo')
clean_story: [Paul] and his son, [Leo], went to the store. [Nancy], [Paul]'s wife, wanted them to pick up stuff for dinner.
proof_state: [{('Nancy', 'son', 'Leo'): [('Nancy', 'husband', 'Paul'), ('Paul', 'son', 'Leo')]}]