[Antonio] and his son [Kevin] went to the park to look for different kinds of birds. [Marie] and her nephew [Aaron] played the piano together. [Kevin] and his brother [Aaron] just talked on the phone for the first time in years. [Kevin] went to the park with his father, [Antonio].
('Kevin', 'Marie')
[Antonio] and his son [Kevin] went to the park to look for different kinds of birds. [Kevin] went to the park with his father, [Antonio]. [Kevin] and his brother [Aaron] just talked on the phone for the first time in years. [Marie] and her nephew [Aaron] played the piano together.
[{('Kevin', 'aunt', 'Marie'): [('Kevin', 'father', 'Antonio'), ('Antonio', 'sister', 'Marie')]}, {('Antonio', 'sister', 'Marie'): [('Antonio', 'son', 'Aaron'), ('Aaron', 'aunt', 'Marie')]}, {('Antonio', 'son', 'Aaron'): [('Antonio', 'son', 'Kevin'), ('Kevin', 'brother', 'Aaron')]}]
['father', 'son', 'brother', 'aunt']