story: [Michael], who is [William]'s uncle, got [William] the video game he wanted for his birthday. [Christopher]'s son [William] entered rehab for the ninth time at the age of thirty.
query: ('Christopher', 'Michael')
clean_story: [Christopher]'s son [William] entered rehab for the ninth time at the age of thirty. [Michael], who is [William]'s uncle, got [William] the video game he wanted for his birthday.
proof_state: [{('Christopher', 'brother', 'Michael'): [('Christopher', 'son', 'William'), ('William', 'uncle', 'Michael')]}]