[Katherine] and her sister [Alma] were getting together this weekend so that they could go hiking together they had n't spent time together alone in a while. [Alma] was sewing a sweater for her sister [Michelle]. [Helen] and her sister [Katherine] were getting together this weekend so that they could go hiking together they had n't spent time together alone in a while.
('Michelle', 'Helen')
[Alma] was sewing a sweater for her sister [Michelle]. [Katherine] and her sister [Alma] were getting together this weekend so that they could go hiking together they had n't spent time together alone in a while. [Helen] and her sister [Katherine] were getting together this weekend so that they could go hiking together they had n't spent time together alone in a while.
[{('Michelle', 'sister', 'Helen'): [('Michelle', 'sister', 'Alma'), ('Alma', 'sister', 'Helen')]}, {('Alma', 'sister', 'Helen'): [('Alma', 'sister', 'Katherine'), ('Katherine', 'sister', 'Helen')]}]