[James] and his son [Joshua] went to the park to look for different kinds of birds. [Lena] and her brother [Joshua] were fighting over the last of the dessert. [Mildred]'s mother [Lena] took the plate away, and said neither of them would get any more.
('Mildred', 'James')
[Lena] and her brother [Joshua] were fighting over the last of the dessert. [Mildred]'s mother [Lena] took the plate away, and said neither of them would get any more. [James] and his son [Joshua] went to the park to look for different kinds of birds.
[{('Mildred', 'grandfather', 'James'): [('Mildred', 'mother', 'Lena'), ('Lena', 'father', 'James')]}, {('Lena', 'father', 'James'): [('Lena', 'brother', 'Joshua'), ('Joshua', 'father', 'James')]}]
['mother', 'brother', 'father']