story: [James] and his son [Bernard] went to the skating rink. [Bernard] and his sister [Rosemary] were hoping for a snow day. [Rosemary] went shopping at the mall with her mother [Crystal]
query: ('Bernard', 'Crystal')
clean_story: [Bernard] and his sister [Rosemary] were hoping for a snow day. [Rosemary] went shopping at the mall with her mother [Crystal]
proof_state: [{('Bernard', 'mother', 'Crystal'): [('Bernard', 'sister', 'Rosemary'), ('Rosemary', 'mother', 'Crystal')]}]