story: [Lisbeth] and her sister [Rose] braided each other's hair before school. [Rose] took her younger sister [Lisa] to the carnival last weekend. [Erik] bought a new refrigerator for his mother [Lisa]. [Rose] was playing tag with her father [Rudolph].
query: ('Erik', 'Rudolph')
clean_story: [Erik] bought a new refrigerator for his mother [Lisa]. [Rose] took her younger sister [Lisa] to the carnival last weekend. [Rose] was playing tag with her father [Rudolph].
proof_state: [{('Erik', 'grandfather', 'Rudolph'): [('Erik', 'mother', 'Lisa'), ('Lisa', 'father', 'Rudolph')]}, {('Lisa', 'father', 'Rudolph'): [('Lisa', 'sister', 'Rose'), ('Rose', 'father', 'Rudolph')]}]