story: [Melissa] was surprised when her husband, [Preston], and her son, [Brian], came back early from their trip to Spain. [Melissa] took her son, [Edward], to the movie theater for his birthday.
query: ('Preston', 'Brian')
clean_story: [Melissa] was surprised when her husband, [Preston], and her son, [Brian], came back early from their trip to Spain.
proof_state: [{('Preston', 'son', 'Brian'): [('Preston', 'wife', 'Melissa'), ('Melissa', 'son', 'Brian')]}]