[Samuel] gets to stay with his grandfather, [Harold] every weekend. [Samuel] loved his mother, [Beverly]. [Robert] took his sisters [Beverly] and [Tracy] on a hiking trip last weekend.
('Tracy', 'Harold')
[Robert] took his sisters [Beverly] and [Tracy] on a hiking trip last weekend. [Samuel] loved his mother, [Beverly]. [Samuel] gets to stay with his grandfather, [Harold] every weekend.
[{('Tracy', 'father', 'Harold'): [('Tracy', 'brother', 'Robert'), ('Robert', 'father', 'Harold')]}, {('Robert', 'father', 'Harold'): [('Robert', 'sister', 'Beverly'), ('Beverly', 'father', 'Harold')]}, {('Beverly', 'father', 'Harold'): [('Beverly', 'son', 'Samuel'), ('Samuel', 'grandfather', 'Harold')]}]
['brother', 'sister', 'son', 'grandfather']