[Chris] and his uncle [Joshua] went fishing yesterday. They caught many trout. [Chris] and his father [Wesley] went to the golf course in town on Saturday and had a great time. [Irvin] asked his father, [Wesley], to help him with his math homework. [Wesley] could n't, because he was lousy at math himself.
('Irvin', 'Joshua')
[Irvin] asked his father, [Wesley], to help him with his math homework. [Wesley] could n't, because he was lousy at math himself. [Chris] and his father [Wesley] went to the golf course in town on Saturday and had a great time. [Chris] and his uncle [Joshua] went fishing yesterday. They caught many trout.
[{('Irvin', 'uncle', 'Joshua'): [('Irvin', 'father', 'Wesley'), ('Wesley', 'brother', 'Joshua')]}, {('Wesley', 'brother', 'Joshua'): [('Wesley', 'son', 'Chris'), ('Chris', 'uncle', 'Joshua')]}]
['father', 'son', 'uncle']