[Pedro] and his brother, [Louis], went to the lake to catch some trout. [Pedro]'s brother [Robert] was invited, but he did n't go because he could n't stand seeing fish get hooked. [Dorothy] took her son [James] to the football game. [Louis] called his nephew [James] and they made plans to go to a football game this weekend.
('Dorothy', 'Robert')
[Dorothy] took her son [James] to the football game. [Louis] called his nephew [James] and they made plans to go to a football game this weekend. [Pedro] and his brother, [Louis], went to the lake to catch some trout. [Pedro]'s brother [Robert] was invited, but he did n't go because he could n't stand seeing fish get hooked.
[{('Dorothy', 'brother', 'Robert'): [('Dorothy', 'brother', 'Louis'), ('Louis', 'brother', 'Robert')]}, {('Dorothy', 'brother', 'Louis'): [('Dorothy', 'son', 'James'), ('James', 'uncle', 'Louis')]}, {('Louis', 'brother', 'Robert'): [('Louis', 'brother', 'Pedro'), ('Pedro', 'brother', 'Robert')]}]
['son', 'uncle', 'brother', 'brother']