[Marie] and her brother [Bobby] were playing basketball. [Bobby]'s father, [Hugh], was watching to make sure they played nice. [Hugh] gave his mother [Frances] flowers on her birthday.
('Marie', 'Frances')
[Marie] and her brother [Bobby] were playing basketball. [Bobby]'s father, [Hugh], was watching to make sure they played nice. [Hugh] gave his mother [Frances] flowers on her birthday.
[{('Marie', 'grandmother', 'Frances'): [('Marie', 'brother', 'Bobby'), ('Bobby', 'grandmother', 'Frances')]}, {('Bobby', 'grandmother', 'Frances'): [('Bobby', 'father', 'Hugh'), ('Hugh', 'mother', 'Frances')]}]
['brother', 'father', 'mother']