[Louis] who is [Samuel]'s father grounded [Samuel] after finding out what [Samuel] had done at school. [Robert] took his brother [Louis] out to get drinks after a long work week. [Samuel] was adopted kid. He discovered last week that [Beverly] is his mother. [Tracy] called [Beverly], her sister, to see if she wanted to go out to eat.
('Robert', 'Tracy')
[Robert] took his brother [Louis] out to get drinks after a long work week. [Louis] who is [Samuel]'s father grounded [Samuel] after finding out what [Samuel] had done at school. [Samuel] was adopted kid. He discovered last week that [Beverly] is his mother. [Tracy] called [Beverly], her sister, to see if she wanted to go out to eat.
[{('Robert', 'sister', 'Tracy'): [('Robert', 'brother', 'Louis'), ('Louis', 'sister', 'Tracy')]}, {('Louis', 'sister', 'Tracy'): [('Louis', 'son', 'Samuel'), ('Samuel', 'aunt', 'Tracy')]}, {('Samuel', 'aunt', 'Tracy'): [('Samuel', 'mother', 'Beverly'), ('Beverly', 'sister', 'Tracy')]}]
['brother', 'son', 'mother', 'sister']