[John] has been trying all day to reach his daughter [Margaret] on the phone. [Margaret] is the [Brent]'s wife.
('John', 'Brent')
[John] has been trying all day to reach his daughter [Margaret] on the phone. [Margaret] is the [Brent]'s wife.
[{('John', 'son-in-law', 'Brent'): [('John', 'daughter', 'Margaret'), ('Margaret', 'husband', 'Brent')]}]