story: [Preston] has been married for over 10 years now. He has a lovely wife named [Melissa]. [Melissa] is married to Thomas and when she was 24, the couple welcomed [Stacy] into the world. [Brian] loved his mother, [Melissa].
query: ('Preston', 'Brian')
clean_story: [Preston] has been married for over 10 years now. He has a lovely wife named [Melissa]. [Brian] loved his mother, [Melissa].
proof_state: [{('Preston', 'son', 'Brian'): [('Preston', 'wife', 'Melissa'), ('Melissa', 'son', 'Brian')]}]