story: [Gabrielle] is making tacos with her son [Dwight]. [Dwight]'s son [David] loves tacos.
query: ('David', 'Gabrielle')
clean_story: [Gabrielle] is making tacos with her son [Dwight]. [Dwight]'s son [David] loves tacos.
proof_state: [{('David', 'grandmother', 'Gabrielle'): [('David', 'father', 'Dwight'), ('Dwight', 'mother', 'Gabrielle')]}]