story: [Sandra] is a woman with a sister named [Marian]. [Jeanna] was worried about her graduation party. Her mother [Sandra] had turned up earlier that day, but her brother [Matthew] was still missing.
query: ('Marian', 'Matthew')
clean_story: [Sandra] is a woman with a sister named [Marian]. [Jeanna] was worried about her graduation party. Her mother [Sandra] had turned up earlier that day, but her brother [Matthew] was still missing.
proof_state: [{('Marian', 'nephew', 'Matthew'): [('Marian', 'sister', 'Sandra'), ('Sandra', 'son', 'Matthew')]}, {('Sandra', 'son', 'Matthew'): [('Sandra', 'daughter', 'Jeanna'), ('Jeanna', 'brother', 'Matthew')]}]