[Francisco] and his brother [Joshua] were planning on going to the beach. [Joshua] asked [Francisco] to make sure that he asked his sister [Lena] and her mother [Frances] if they wanted to come.
('Joshua', 'Frances')
[Francisco] and his brother [Joshua] were planning on going to the beach. [Joshua] asked [Francisco] to make sure that he asked his sister [Lena] and her mother [Frances] if they wanted to come.
[{('Joshua', 'mother', 'Frances'): [('Joshua', 'brother', 'Francisco'), ('Francisco', 'mother', 'Frances')]}, {('Francisco', 'mother', 'Frances'): [('Francisco', 'sister', 'Lena'), ('Lena', 'mother', 'Frances')]}]
['brother', 'sister', 'mother']