story: [Louise] invited her father [Alfred] to her high school father daughter dance. [Rudolph] took his son [Alfred] fishing one day and [Rudolph]'s wife [Sandra] packed them food to take with them. [Alfred]'s son is [Kenneth]. [Kenneth] and his father always go fishing together on Sundays and have a great time together.
query: ('Sandra', 'Kenneth')
clean_story: [Rudolph] took his son [Alfred] fishing one day and [Rudolph]'s wife [Sandra] packed them food to take with them. [Alfred]'s son is [Kenneth]. [Kenneth] and his father always go fishing together on Sundays and have a great time together.
proof_state: [{('Sandra', 'grandson', 'Kenneth'): [('Sandra', 'son', 'Alfred'), ('Alfred', 'son', 'Kenneth')]}, {('Sandra', 'son', 'Alfred'): [('Sandra', 'husband', 'Rudolph'), ('Rudolph', 'son', 'Alfred')]}]