[Nicholas] is taking his son [Dennis] on a camping trip for the weekend. [Dennis] and his brother [Glen] went to the carnival. [Glen] wanted to ride the Ferris wheel, but [Dennis] insisted they go on the bumper cars first.
('Glen', 'Nicholas')
[Dennis] and his brother [Glen] went to the carnival. [Glen] wanted to ride the Ferris wheel, but [Dennis] insisted they go on the bumper cars first. [Nicholas] is taking his son [Dennis] on a camping trip for the weekend.
[{('Glen', 'father', 'Nicholas'): [('Glen', 'brother', 'Dennis'), ('Dennis', 'father', 'Nicholas')]}]
['brother', 'father']