story: [Richard]'s mother [Carol] secretly put money away for him to go on a trip next fall. [Rudolph] took his grandsons, [Richard] and [David], camping. [Richard]'s father, [Mark], wanted to go but he had to work.
query: ('Mark', 'Rudolph')
clean_story: [Rudolph] took his grandsons, [Richard] and [David], camping. [Richard]'s father, [Mark], wanted to go but he had to work.
proof_state: [{('Mark', 'father', 'Rudolph'): [('Mark', 'son', 'Richard'), ('Richard', 'grandfather', 'Rudolph')]}, {('Richard', 'grandfather', 'Rudolph'): [('Richard', 'brother', 'David'), ('David', 'grandfather', 'Rudolph')]}]