story: [Alan] spent the day with his sister, [Sandra], and his daughter [Venita]. [Sandra] and her sister [Marian] are the only children in their family.
query: ('Marian', 'Venita')
clean_story: [Sandra] and her sister [Marian] are the only children in their family. [Alan] spent the day with his sister, [Sandra], and his daughter [Venita].
proof_state: [{('Marian', 'niece', 'Venita'): [('Marian', 'brother', 'Alan'), ('Alan', 'daughter', 'Venita')]}, {('Marian', 'brother', 'Alan'): [('Marian', 'sister', 'Sandra'), ('Sandra', 'brother', 'Alan')]}]