[Wesley] and his brother [Joshua] were playing tag in the park. [Frances] likes taking her son [Wesley] to school. [Frances] took her daughter [David] to school during the cold winter morning.
('David', 'Joshua')
[Frances] took her daughter [David] to school during the cold winter morning. [Frances] likes taking her son [Wesley] to school. [Wesley] and his brother [Joshua] were playing tag in the park.
[{('David', 'brother', 'Joshua'): [('David', 'brother', 'Wesley'), ('Wesley', 'brother', 'Joshua')]}, {('David', 'brother', 'Wesley'): [('David', 'mother', 'Frances'), ('Frances', 'son', 'Wesley')]}]
['mother', 'son', 'brother']