[Antonio] took his niece [Heather] to the park to walk her dog. [Pedro] went shopping with his wife [Dorothy]. [Antonio] and his sister [Marie] went to the park. [Pedro] has been trying all day to reach his daughter [Heather] on the phone.
('Dorothy', 'Marie')
[Pedro] went shopping with his wife [Dorothy]. [Pedro] has been trying all day to reach his daughter [Heather] on the phone. [Antonio] took his niece [Heather] to the park to walk her dog. [Antonio] and his sister [Marie] went to the park.
[{('Dorothy', 'sister', 'Marie'): [('Dorothy', 'brother', 'Antonio'), ('Antonio', 'sister', 'Marie')]}, {('Dorothy', 'brother', 'Antonio'): [('Dorothy', 'daughter', 'Heather'), ('Heather', 'uncle', 'Antonio')]}, {('Dorothy', 'daughter', 'Heather'): [('Dorothy', 'husband', 'Pedro'), ('Pedro', 'daughter', 'Heather')]}]
['husband', 'daughter', 'uncle', 'sister']