story: [Richard] went to the grocery store for his brother [David], because he broke his leg. [Jason] was helping his mother, [Carol], and his father, [Mark], with their taxes. [David] had tried earlier, but his mother [Carol] felt [Jason] had more expertise on the matter.
query: ('David', 'Mark')
clean_story: [Jason] was helping his mother, [Carol], and his father, [Mark], with their taxes. [David] had tried earlier, but his mother [Carol] felt [Jason] had more expertise on the matter.
proof_state: [{('David', 'father', 'Mark'): [('David', 'brother', 'Jason'), ('Jason', 'father', 'Mark')]}, {('David', 'brother', 'Jason'): [('David', 'mother', 'Carol'), ('Carol', 'son', 'Jason')]}]