story: [Preston] has been married for over 10 years now. He has a lovely wife named [Melissa]. [Preston] was so proud that his son [Brian] won the science fair! [Adam] decided to take his son, [Preston], on a ski vacation.
query: ('Adam', 'Brian')
clean_story: [Adam] decided to take his son, [Preston], on a ski vacation. [Preston] was so proud that his son [Brian] won the science fair!
proof_state: [{('Adam', 'grandson', 'Brian'): [('Adam', 'son', 'Preston'), ('Preston', 'son', 'Brian')]}]