story: [Marlene] bought gifts for her grandfather [Kyle] and her sister [Serena] when she went to the mall. [Lisa] and her sister, [Serena], frequently bicker. However, they always make up quickly. [Kyle] enjoyed talking to his granddaughter [Serena] when she came over to visit.
clean_story: [Kyle] enjoyed talking to his granddaughter [Serena] when she came over to visit. [Lisa] and her sister, [Serena], frequently bicker. However, they always make up quickly.
proof_state: [{('Kyle', 'granddaughter', 'Lisa'): [('Kyle', 'granddaughter', 'Serena'), ('Serena', 'sister', 'Lisa')]}]