[Lena] was trying to calm down her daughter [Martha]. [Martha] was upset because her brother [Chris] kept making fun of her. [Chris] and his brother [Charles] went to the carnival. [Charles] wanted to ride the Ferris wheel, but [Chris] insisted they go on the bumper cars first.
('Charles', 'Lena')
[Chris] and his brother [Charles] went to the carnival. [Charles] wanted to ride the Ferris wheel, but [Chris] insisted they go on the bumper cars first. [Lena] was trying to calm down her daughter [Martha]. [Martha] was upset because her brother [Chris] kept making fun of her.
[{('Charles', 'mother', 'Lena'): [('Charles', 'brother', 'Chris'), ('Chris', 'mother', 'Lena')]}, {('Chris', 'mother', 'Lena'): [('Chris', 'sister', 'Martha'), ('Martha', 'mother', 'Lena')]}]
['brother', 'sister', 'mother']