story: [Lisbeth] and her sister [Rose] went shopping at the mall. [Lisbeth]'s daughter [Anita] stayed home to study. [Mark] always enjoyed playing with his sister, [Rose], when they were growing up. [Mark] took her daughter [Anna] for ice cream.
query: ('Mark', 'Anita')
clean_story: [Mark] always enjoyed playing with his sister, [Rose], when they were growing up. [Lisbeth] and her sister [Rose] went shopping at the mall. [Lisbeth]'s daughter [Anita] stayed home to study.
proof_state: [{('Mark', 'niece', 'Anita'): [('Mark', 'sister', 'Lisbeth'), ('Lisbeth', 'daughter', 'Anita')]}, {('Mark', 'sister', 'Lisbeth'): [('Mark', 'sister', 'Rose'), ('Rose', 'sister', 'Lisbeth')]}]