[Louis] and his sister [Dorothy] got their mother [Dorothy] a new computer for her birthday. She really liked it. [Tracy] was more than happy to help her sister by watching her child [Annie]. [Robert] and his sister [Tracy] went to brunch today at the new diner. [Dorothy] and her daughter [Annie] went out for ice cream. [Dorothy] got a cone and [Annie] got a sundae.
('Louis', 'Robert')
[Louis] and his sister [Dorothy] got their mother [Dorothy] a new computer for her birthday. She really liked it. [Dorothy] and her daughter [Annie] went out for ice cream. [Dorothy] got a cone and [Annie] got a sundae. [Tracy] was more than happy to help her sister by watching her child [Annie]. [Robert] and his sister [Tracy] went to brunch today at the new diner.
[{('Louis', 'brother', 'Robert'): [('Louis', 'sister', 'Dorothy'), ('Dorothy', 'brother', 'Robert')]}, {('Dorothy', 'brother', 'Robert'): [('Dorothy', 'sister', 'Tracy'), ('Tracy', 'brother', 'Robert')]}, {('Dorothy', 'sister', 'Tracy'): [('Dorothy', 'daughter', 'Annie'), ('Annie', 'aunt', 'Tracy')]}]
['sister', 'daughter', 'aunt', 'brother']