[Francisco] and his brother [Hugh] went to the park. They threw a ball around and played with their dog. [Hugh] is a very hot guy, but his sister [Lena] is even more attractive. [Lynn] could n't wait for the surprise birthday party that she was throwing for her brother [Francisco] next weekend.
('Lena', 'Lynn')
[Hugh] is a very hot guy, but his sister [Lena] is even more attractive. [Francisco] and his brother [Hugh] went to the park. They threw a ball around and played with their dog. [Lynn] could n't wait for the surprise birthday party that she was throwing for her brother [Francisco] next weekend.
[{('Lena', 'sister', 'Lynn'): [('Lena', 'brother', 'Francisco'), ('Francisco', 'sister', 'Lynn')]}, {('Lena', 'brother', 'Francisco'): [('Lena', 'brother', 'Hugh'), ('Hugh', 'brother', 'Francisco')]}]
['brother', 'brother', 'sister']