story: [Vanessa] saw her mother, [Alma], at the mall. [Alma] was there shopping with her son [Chad].
query: ('Vanessa', 'Chad')
clean_story: [Vanessa] saw her mother, [Alma], at the mall. [Alma] was there shopping with her son [Chad].
proof_state: [{('Vanessa', 'brother', 'Chad'): [('Vanessa', 'mother', 'Alma'), ('Alma', 'son', 'Chad')]}]