story: [Sandra] took her grandson [David] a meal from McDonalds and his father [Mark] took [Mark]'s other son [Richard] a pizza from Pizza Hut for dinner. [Jason] and his brother [David] went to the arcade. They had a wonderful time.
query: ('Sandra', 'Richard')
clean_story: [Sandra] took her grandson [David] a meal from McDonalds and his father [Mark] took [Mark]'s other son [Richard] a pizza from Pizza Hut for dinner.
proof_state: [{('Sandra', 'grandson', 'Richard'): [('Sandra', 'grandson', 'David'), ('David', 'brother', 'Richard')]}, {('David', 'brother', 'Richard'): [('David', 'father', 'Mark'), ('Mark', 'son', 'Richard')]}]