story: [Michelle] loved when her grandson [Robert] came to visit her after school. [Sabrina] invited her father [Paul] to her high school father daughter dance. [Paul] who is [Robert]'s father grounded [Robert] after finding out what [Robert] had done at school.
query: ('Paul', 'Michelle')
clean_story: [Paul] who is [Robert]'s father grounded [Robert] after finding out what [Robert] had done at school. [Michelle] loved when her grandson [Robert] came to visit her after school.
proof_state: [{('Paul', 'mother', 'Michelle'): [('Paul', 'son', 'Robert'), ('Robert', 'grandmother', 'Michelle')]}]