story: [Lisa] is taking her nephew [Chad] to the park. [Chad]'s father [Michael] is going to coach the team this year.
query: ('Michael', 'Lisa')
clean_story: [Chad]'s father [Michael] is going to coach the team this year. [Lisa] is taking her nephew [Chad] to the park.
proof_state: [{('Michael', 'sister', 'Lisa'): [('Michael', 'son', 'Chad'), ('Chad', 'aunt', 'Lisa')]}]