story: [Lisa] bought gifts for her grandfather [Kyle] and her sister [Marlene] when she went to the mall. [Barbara] took her sister, [Lisa], out to dinner for her birthday. [Marlene], who is the sister of [Barbara], is a lovely girl.
clean_story: [Lisa] bought gifts for her grandfather [Kyle] and her sister [Marlene] when she went to the mall.
proof_state: [{('Kyle', 'granddaughter', 'Marlene'): [('Kyle', 'granddaughter', 'Lisa'), ('Lisa', 'sister', 'Marlene')]}]