[Lena] wanted her daughter, [Tina], to go shopping with her. [Tina] invited her sister, [Mildred]. [Mildred] received a very nice letter from her grandfather [James].
('Lena', 'James')
[Lena] wanted her daughter, [Tina], to go shopping with her. [Tina] invited her sister, [Mildred]. [Mildred] received a very nice letter from her grandfather [James].
[{('Lena', 'father', 'James'): [('Lena', 'daughter', 'Tina'), ('Tina', 'grandfather', 'James')]}, {('Tina', 'grandfather', 'James'): [('Tina', 'sister', 'Mildred'), ('Mildred', 'grandfather', 'James')]}]
['daughter', 'sister', 'grandfather']