[Robert] and his son, [Ronald], recently heard that [Harold] was in the hospital. [Ronald] loves his grandfather very much, and went to visit [Harold] immediately, but [Robert] was too busy. [Louis] likes playing catch with his sister [Tracy], but his brother [Robert] never wants to play.
('Tracy', 'Harold')
[Louis] likes playing catch with his sister [Tracy], but his brother [Robert] never wants to play. [Robert] and his son, [Ronald], recently heard that [Harold] was in the hospital. [Ronald] loves his grandfather very much, and went to visit [Harold] immediately, but [Robert] was too busy.
[{('Tracy', 'father', 'Harold'): [('Tracy', 'brother', 'Robert'), ('Robert', 'father', 'Harold')]}, {('Robert', 'father', 'Harold'): [('Robert', 'son', 'Ronald'), ('Ronald', 'grandfather', 'Harold')]}, {('Tracy', 'brother', 'Robert'): [('Tracy', 'brother', 'Louis'), ('Louis', 'brother', 'Robert')]}]
['brother', 'brother', 'son', 'grandfather']