[Aaron] and [Kevin] are brothers who look nothing alike. [Kevin] bought a book for his father [Antonio]. [Aaron] does n't like his grandfather [Harold]. The boy thinks he's old, and weird. [Antonio] and his sister [Dorothy] went to brunch today at the new diner.
('Dorothy', 'Harold')
[Antonio] and his sister [Dorothy] went to brunch today at the new diner. [Kevin] bought a book for his father [Antonio]. [Aaron] and [Kevin] are brothers who look nothing alike. [Aaron] does n't like his grandfather [Harold]. The boy thinks he's old, and weird.
[{('Dorothy', 'father', 'Harold'): [('Dorothy', 'brother', 'Antonio'), ('Antonio', 'father', 'Harold')]}, {('Antonio', 'father', 'Harold'): [('Antonio', 'son', 'Kevin'), ('Kevin', 'grandfather', 'Harold')]}, {('Kevin', 'grandfather', 'Harold'): [('Kevin', 'brother', 'Aaron'), ('Aaron', 'grandfather', 'Harold')]}]
['brother', 'son', 'brother', 'grandfather']