story: [Peter] was picking up his son, [Erik], from a soccer game when he received a call from his sister, [Lisbeth]. [Stacy] went to the park with his father, [Peter]. [Rudolph] and his daughter [Lisbeth] like to read poems together.
query: ('Erik', 'Rudolph')
clean_story: [Peter] was picking up his son, [Erik], from a soccer game when he received a call from his sister, [Lisbeth]. [Rudolph] and his daughter [Lisbeth] like to read poems together.
proof_state: [{('Erik', 'grandfather', 'Rudolph'): [('Erik', 'father', 'Peter'), ('Peter', 'father', 'Rudolph')]}, {('Peter', 'father', 'Rudolph'): [('Peter', 'sister', 'Lisbeth'), ('Lisbeth', 'father', 'Rudolph')]}]