story: [Denver] invited his mother [Mary] and grandmother [Nettie] over for dinner. [Ryan]'s wife, [Mary], surprised him on his birthday. He could n't believe she pulled it off. [Mary] and her son [Pedro] made hot dogs. [Pedro]'s brother [Denver] ate one.
clean_story: [Ryan]'s wife, [Mary], surprised him on his birthday. He could n't believe she pulled it off. [Denver] invited his mother [Mary] and grandmother [Nettie] over for dinner.
proof_state: [{('Ryan', 'mother-in-law', 'Nettie'): [('Ryan', 'wife', 'Mary'), ('Mary', 'mother', 'Nettie')]}, {('Mary', 'mother', 'Nettie'): [('Mary', 'son', 'Denver'), ('Denver', 'grandmother', 'Nettie')]}]