[Harold]'s son [Louis] is in the hospital. [Louis]'s brother [Pedro] accidentally hit him with a hammer. [Robert] told his daughter [Angelica] that her grandfather, [Harold], wanted to speak to her. [Angelica] called [Harold] up to see what he wanted.
('Robert', 'Pedro')
[Robert] told his daughter [Angelica] that her grandfather, [Harold], wanted to speak to her. [Angelica] called [Harold] up to see what he wanted. [Harold]'s son [Louis] is in the hospital. [Louis]'s brother [Pedro] accidentally hit him with a hammer.
[{('Robert', 'brother', 'Pedro'): [('Robert', 'brother', 'Louis'), ('Louis', 'brother', 'Pedro')]}, {('Robert', 'brother', 'Louis'): [('Robert', 'father', 'Harold'), ('Harold', 'son', 'Louis')]}, {('Robert', 'father', 'Harold'): [('Robert', 'daughter', 'Angelica'), ('Angelica', 'grandfather', 'Harold')]}]
['daughter', 'grandfather', 'son', 'brother']