story: [Lisbeth] is very proud of her son. His name is [Kenneth]. [Sandra] bought her son [James] a car. [James]'s sister [Lisbeth] was jealous. [Lisbeth] sat anxiously in the airport terminal, waiting to see her son [Willie] walk through the gate.
query: ('Kenneth', 'Sandra')
clean_story: [Lisbeth] is very proud of her son. His name is [Kenneth]. [Sandra] bought her son [James] a car. [James]'s sister [Lisbeth] was jealous.
proof_state: [{('Kenneth', 'grandmother', 'Sandra'): [('Kenneth', 'mother', 'Lisbeth'), ('Lisbeth', 'mother', 'Sandra')]}, {('Lisbeth', 'mother', 'Sandra'): [('Lisbeth', 'brother', 'James'), ('James', 'mother', 'Sandra')]}]