[Lena] is looking for a good gift for her sister [David]. [Lena] was so proud of her daughter [Martha] for getting straight A's this semester. [David] was shopping for a new jacket with her father [James].
('Martha', 'James')
[Lena] was so proud of her daughter [Martha] for getting straight A's this semester. [Lena] is looking for a good gift for her sister [David]. [David] was shopping for a new jacket with her father [James].
[{('Martha', 'grandfather', 'James'): [('Martha', 'mother', 'Lena'), ('Lena', 'father', 'James')]}, {('Lena', 'father', 'James'): [('Lena', 'sister', 'David'), ('David', 'father', 'James')]}]
['mother', 'sister', 'father']