story: [Robert]'s father, [Paul], bought him some ice cream. [Paul] does not know he has a son named [Jess]. [Paul] has been trying all day to reach his daughter [Sabrina] on the phone.
query: ('Robert', 'Sabrina')
clean_story: [Robert]'s father, [Paul], bought him some ice cream. [Paul] has been trying all day to reach his daughter [Sabrina] on the phone.
proof_state: [{('Robert', 'sister', 'Sabrina'): [('Robert', 'father', 'Paul'), ('Paul', 'daughter', 'Sabrina')]}]