story: [David] and his sister [Mary] went to the movies to watch the newest superhero flick. [David] takes his grandmother, [Sandra] and his father [Carol] shopping each month.Sometimes, [Carol]'s husband, [Mark] goes along.
query: ('Mark', 'Sandra')
clean_story: [David] takes his grandmother, [Sandra] and his father [Carol] shopping each month.Sometimes, [Carol]'s husband, [Mark] goes along.
proof_state: [{('Mark', 'mother', 'Sandra'): [('Mark', 'son', 'David'), ('David', 'grandmother', 'Sandra')]}, {('Mark', 'son', 'David'): [('Mark', 'wife', 'Carol'), ('Carol', 'son', 'David')]}]