story: [Melissa] went to the arcade with her niece, [Tammy]. They had lots of fun playing together. [Tammy] invited her father [Otto] to dinner. [Tammy] was celebrating her birthday with her mother [Minnie].
query: ('Otto', 'Melissa')
clean_story: [Tammy] invited her father [Otto] to dinner. [Melissa] went to the arcade with her niece, [Tammy]. They had lots of fun playing together.
proof_state: [{('Otto', 'sister', 'Melissa'): [('Otto', 'daughter', 'Tammy'), ('Tammy', 'aunt', 'Melissa')]}]