story: [Gabrielle] had to pick up her grandson [Chad] and his sister, [Jennifer], from school today.
query: ('Gabrielle', 'Jennifer')
clean_story: [Gabrielle] had to pick up her grandson [Chad] and his sister, [Jennifer], from school today.
proof_state: [{('Gabrielle', 'granddaughter', 'Jennifer'): [('Gabrielle', 'grandson', 'Chad'), ('Chad', 'sister', 'Jennifer')]}]