[Richard] was so excited to give his mother, [Cindy], a really nice card for Mother's Day. He loves her very much. [Cindy] was unhappy with her son, [Pete], and his grades. She enlisted a tutor to help him. [Lena] and her nephew [Pete] played the piano together.
('Richard', 'Lena')
[Richard] was so excited to give his mother, [Cindy], a really nice card for Mother's Day. He loves her very much. [Cindy] was unhappy with her son, [Pete], and his grades. She enlisted a tutor to help him. [Lena] and her nephew [Pete] played the piano together.
[{('Richard', 'aunt', 'Lena'): [('Richard', 'mother', 'Cindy'), ('Cindy', 'sister', 'Lena')]}, {('Cindy', 'sister', 'Lena'): [('Cindy', 'son', 'Pete'), ('Pete', 'aunt', 'Lena')]}]
['mother', 'son', 'aunt']