story: [Sandra] and her husband [Rudolph] like taking their grandson [Richard] to the park. [Richard]'s brother [David] does not go because he always causes trouble. [Carmen] has always had an estranged relationship with her grandfather, [Rudolph].
query: ('Sandra', 'David')
clean_story: [Sandra] and her husband [Rudolph] like taking their grandson [Richard] to the park. [Richard]'s brother [David] does not go because he always causes trouble.
proof_state: [{('Sandra', 'grandson', 'David'): [('Sandra', 'husband', 'Rudolph'), ('Rudolph', 'grandson', 'David')]}, {('Rudolph', 'grandson', 'David'): [('Rudolph', 'grandson', 'Richard'), ('Richard', 'brother', 'David')]}]