[Lena] loves to make cookies for her son. His name is [Charles]. [David] has sister who just had a baby boy and named him [Charles]. [David] is exited to be his aunt. [Lena] took her daughter [Martha] to school during the cold winter morning.
('Martha', 'David')
[Lena] took her daughter [Martha] to school during the cold winter morning. [Lena] loves to make cookies for her son. His name is [Charles]. [David] has sister who just had a baby boy and named him [Charles]. [David] is exited to be his aunt.
[{('Martha', 'aunt', 'David'): [('Martha', 'mother', 'Lena'), ('Lena', 'sister', 'David')]}, {('Lena', 'sister', 'David'): [('Lena', 'son', 'Charles'), ('Charles', 'aunt', 'David')]}]
['mother', 'son', 'aunt']