story: [Michelle] and her sister [Valerie] took [Michelle] kids [Kirk] and [May] to get pizza after school yesterday.
query: ('May', 'Valerie')
clean_story: [Michelle] and her sister [Valerie] took [Michelle] kids [Kirk] and [May] to get pizza after school yesterday.
proof_state: [{('May', 'aunt', 'Valerie'): [('May', 'mother', 'Michelle'), ('Michelle', 'sister', 'Valerie')]}, {('May', 'mother', 'Michelle'): [('May', 'brother', 'Kirk'), ('Kirk', 'mother', 'Michelle')]}]