[Annie] needed to go to the store. [Annie] asked her sister [Heather] for a ride. [Harold] and his son [Robert] went to the park to look for different kinds of birds. [Annie] called her dad [Pedro] to pick her up from school. [Robert] likes to watch boxing with his brother. His name is [Pedro].
('Heather', 'Harold')
[Annie] needed to go to the store. [Annie] asked her sister [Heather] for a ride. [Annie] called her dad [Pedro] to pick her up from school. [Robert] likes to watch boxing with his brother. His name is [Pedro]. [Harold] and his son [Robert] went to the park to look for different kinds of birds.
[{('Heather', 'grandfather', 'Harold'): [('Heather', 'sister', 'Annie'), ('Annie', 'grandfather', 'Harold')]}, {('Annie', 'grandfather', 'Harold'): [('Annie', 'father', 'Pedro'), ('Pedro', 'father', 'Harold')]}, {('Pedro', 'father', 'Harold'): [('Pedro', 'brother', 'Robert'), ('Robert', 'father', 'Harold')]}]
['sister', 'father', 'brother', 'father']