[John] and his dad [George] went to the mall to buy a birthday present for [Lillian]. It was also a Mother's Day gift.
('Lillian', 'John')
[John] and his dad [George] went to the mall to buy a birthday present for [Lillian]. It was also a Mother's Day gift.
[{('Lillian', 'son', 'John'): [('Lillian', 'husband', 'George'), ('George', 'son', 'John')]}]
['husband', 'son']