story: [Scott] and [Lewis] are brothers. [Jason] is father of their father
query: ('Jason', 'Lewis')
clean_story: [Scott] and [Lewis] are brothers. [Jason] is father of their father
proof_state: [{('Jason', 'grandson', 'Lewis'): [('Jason', 'grandson', 'Scott'), ('Scott', 'brother', 'Lewis')]}]
edge_types: ['grandson', 'brother']