[Joshua] tripped his brother [Francisco] in the living room. [Francisco] and his sister [David] went to the ice skating rink. [Francisco] fell down and [David] laughed at him. [Wesley] was angry with his brother [Joshua] for forgetting to pick him up from school.
('Wesley', 'David')
[Wesley] was angry with his brother [Joshua] for forgetting to pick him up from school. [Joshua] tripped his brother [Francisco] in the living room. [Francisco] and his sister [David] went to the ice skating rink. [Francisco] fell down and [David] laughed at him.
[{('Wesley', 'sister', 'David'): [('Wesley', 'brother', 'Joshua'), ('Joshua', 'sister', 'David')]}, {('Joshua', 'sister', 'David'): [('Joshua', 'brother', 'Francisco'), ('Francisco', 'sister', 'David')]}]
['brother', 'brother', 'sister']