story: [Brian] and his brother [Mack] went out for lunch. [Brian] had a burger, and [Mack] had a chicken sandwich. [Brian] and his brother [Edward] were playing tag in the park. [Melissa] was so excited to learn that her son [Brian] got accepted into college.
query: ('Melissa', 'Mack')
clean_story: [Melissa] was so excited to learn that her son [Brian] got accepted into college. [Brian] and his brother [Mack] went out for lunch. [Brian] had a burger, and [Mack] had a chicken sandwich.
proof_state: [{('Melissa', 'son', 'Mack'): [('Melissa', 'son', 'Brian'), ('Brian', 'brother', 'Mack')]}]