story: [Alfred] read a bedtime story to his daughter [Ellen]. [Lisbeth] and her daughter [Ellen] went out to dinner. [Alfred] asked his mother [Sandra] to read to him. [Sandra] was too busy. [Lisbeth] took her son [Willie] to the mall to shop for school clothes.
query: ('Lisbeth', 'Sandra')
clean_story: [Lisbeth] and her daughter [Ellen] went out to dinner. [Alfred] read a bedtime story to his daughter [Ellen]. [Alfred] asked his mother [Sandra] to read to him. [Sandra] was too busy.
proof_state: [{('Lisbeth', 'mother', 'Sandra'): [('Lisbeth', 'daughter', 'Ellen'), ('Ellen', 'grandmother', 'Sandra')]}, {('Ellen', 'grandmother', 'Sandra'): [('Ellen', 'father', 'Alfred'), ('Alfred', 'mother', 'Sandra')]}]