story: [Joe] always looked up to his brother [Lewis]. [Lewis] called his brother [David] on Friday because it was his birthday.
query: ('Joe', 'David')
clean_story: [Joe] always looked up to his brother [Lewis]. [Lewis] called his brother [David] on Friday because it was his birthday.
proof_state: [{('Joe', 'brother', 'David'): [('Joe', 'brother', 'Lewis'), ('Lewis', 'brother', 'David')]}]