[Jennifer] needed to go to the store. [Jennifer] asked her sister [Karen] for a ride. [Louis] went to the baseball game with his son [Samuel] [Samuel] and his dad [Louis] were getting lunch in the kitchen. [Samuel]'s sister [Jennifer] joined them.
('Karen', 'Samuel')
[Jennifer] needed to go to the store. [Jennifer] asked her sister [Karen] for a ride. [Samuel] and his dad [Louis] were getting lunch in the kitchen. [Samuel]'s sister [Jennifer] joined them. [Louis] went to the baseball game with his son [Samuel]
[{('Karen', 'brother', 'Samuel'): [('Karen', 'father', 'Louis'), ('Louis', 'son', 'Samuel')]}, {('Karen', 'father', 'Louis'): [('Karen', 'sister', 'Jennifer'), ('Jennifer', 'father', 'Louis')]}, {('Jennifer', 'father', 'Louis'): [('Jennifer', 'brother', 'Samuel'), ('Samuel', 'father', 'Louis')]}]
['sister', 'brother', 'father', 'son']