story: [Rudolph] and his wife [Sandra] bought a car and [Rudolph]'s sons [Mark] and [James] really like it. [Peter]'s father's name is [Rudolph].
query: ('Sandra', 'Mark')
clean_story: [Rudolph] and his wife [Sandra] bought a car and [Rudolph]'s sons [Mark] and [James] really like it.
proof_state: [{('Sandra', 'son', 'Mark'): [('Sandra', 'husband', 'Rudolph'), ('Rudolph', 'son', 'Mark')]}, {('Rudolph', 'son', 'Mark'): [('Rudolph', 'son', 'James'), ('James', 'brother', 'Mark')]}]