story: [Myrna] picked her son [Jeffrey] up from school. His sister [Anna] was home sick with a cold.
query: ('Myrna', 'Anna')
clean_story: [Myrna] picked her son [Jeffrey] up from school. His sister [Anna] was home sick with a cold.
proof_state: [{('Myrna', 'daughter', 'Anna'): [('Myrna', 'son', 'Jeffrey'), ('Jeffrey', 'sister', 'Anna')]}]