story: [Michael] was so excited to introduce his new girlfriend to his mother, [Carol]. [David] is a factory worker. He has a wonderful sister by the name of [Mary]. [Carol] has been waiting around all day for her son, [David]. [Mark] prepared romantic dinner for Valentine's Day for his wife, [Carol].
query: ('Mark', 'Mary')
clean_story: [Mark] prepared romantic dinner for Valentine's Day for his wife, [Carol]. [Carol] has been waiting around all day for her son, [David]. [David] is a factory worker. He has a wonderful sister by the name of [Mary].
proof_state: [{('Mark', 'daughter', 'Mary'): [('Mark', 'wife', 'Carol'), ('Carol', 'daughter', 'Mary')]}, {('Carol', 'daughter', 'Mary'): [('Carol', 'son', 'David'), ('David', 'sister', 'Mary')]}]