[Pedro] and his wife [Dorothy] got married in Spain. [Roberto] wanted to get a good gift for his sister, [Annie] [Dorothy] likes taking her son [Roberto] to school. [James] asked his father [Pedro] if he could borrow some money.
('James', 'Annie')
[James] asked his father [Pedro] if he could borrow some money. [Pedro] and his wife [Dorothy] got married in Spain. [Dorothy] likes taking her son [Roberto] to school. [Roberto] wanted to get a good gift for his sister, [Annie]
[{('James', 'sister', 'Annie'): [('James', 'father', 'Pedro'), ('Pedro', 'daughter', 'Annie')]}, {('Pedro', 'daughter', 'Annie'): [('Pedro', 'son', 'Roberto'), ('Roberto', 'sister', 'Annie')]}, {('Pedro', 'son', 'Roberto'): [('Pedro', 'wife', 'Dorothy'), ('Dorothy', 'son', 'Roberto')]}]
['father', 'wife', 'son', 'sister']