story: [Gabrielle], her husband [Jason], and [Jason]'s grandson, [David], went to the circus. [David] loved to see the clowns.
query: ('Gabrielle', 'David')
clean_story: [Gabrielle], her husband [Jason], and [Jason]'s grandson, [David], went to the circus. [David] loved to see the clowns.
proof_state: [{('Gabrielle', 'grandson', 'David'): [('Gabrielle', 'husband', 'Jason'), ('Jason', 'grandson', 'David')]}]