[Pedro] and his wife [Dorothy] went rock-climbing this weekend. Yesterday afternoon, [Dorothy] was watching her husband [Pedro] showing his daughter [Heather] how to fly a kite. Afterwards, [Heather] went to brag to her brother [Jerome] that she can and he ca n't.
('Pedro', 'Jerome')
[Pedro] and his wife [Dorothy] went rock-climbing this weekend. Yesterday afternoon, [Dorothy] was watching her husband [Pedro] showing his daughter [Heather] how to fly a kite. Afterwards, [Heather] went to brag to her brother [Jerome] that she can and he ca n't.
[{('Pedro', 'son', 'Jerome'): [('Pedro', 'wife', 'Dorothy'), ('Dorothy', 'son', 'Jerome')]}, {('Dorothy', 'son', 'Jerome'): [('Dorothy', 'daughter', 'Heather'), ('Heather', 'brother', 'Jerome')]}, {('Dorothy', 'daughter', 'Heather'): [('Dorothy', 'husband', 'Pedro'), ('Pedro', 'daughter', 'Heather')]}]
['wife', 'husband', 'daughter', 'brother']