story: [Robert] and his wife [Dulce] decided to visit [Dulce]'s mother [Nancy] on Sunday. [Sabrina] called [Dulce], her sister, to see if she wanted to go out to eat.
query: ('Robert', 'Nancy')
clean_story: [Robert] and his wife [Dulce] decided to visit [Dulce]'s mother [Nancy] on Sunday.
proof_state: [{('Robert', 'mother-in-law', 'Nancy'): [('Robert', 'wife', 'Dulce'), ('Dulce', 'mother', 'Nancy')]}]