[Thomas] got into an argument with his brother [Don] and pushed him to the floor. As he burst into tears [Thomas] ran to his mother [Lynn] for comfort. [Lynn] and her sister [David] were getting together this weekend so that they could go hiking together they had n't spent time together alone in a while.
('David', 'Don')
[Lynn] and her sister [David] were getting together this weekend so that they could go hiking together they had n't spent time together alone in a while. [Thomas] got into an argument with his brother [Don] and pushed him to the floor. As he burst into tears [Thomas] ran to his mother [Lynn] for comfort.
[{('David', 'nephew', 'Don'): [('David', 'sister', 'Lynn'), ('Lynn', 'son', 'Don')]}, {('Lynn', 'son', 'Don'): [('Lynn', 'son', 'Thomas'), ('Thomas', 'brother', 'Don')]}]
['sister', 'son', 'brother']