story: [Adam]'s granddaughter, [Maria], asked him for help. She told him her brother [Robert] was missing, and she needed an adult to help find him. [Adam] is a man with a granddaughter named [Sabrina].
query: ('Adam', 'Robert')
clean_story: [Adam]'s granddaughter, [Maria], asked him for help. She told him her brother [Robert] was missing, and she needed an adult to help find him.
proof_state: [{('Adam', 'grandson', 'Robert'): [('Adam', 'granddaughter', 'Maria'), ('Maria', 'brother', 'Robert')]}]