One day [Michael] was hanging out with his mother [David] when the phone rang. [David] answered the phone and spoke to her mother [Frances]. They spoke for a few minutes then hung up the phone. [Hugh] does not know he has a son named [Michael].
('Hugh', 'Frances')
[Hugh] does not know he has a son named [Michael]. One day [Michael] was hanging out with his mother [David] when the phone rang. [David] answered the phone and spoke to her mother [Frances]. They spoke for a few minutes then hung up the phone.
[{('Hugh', 'mother', 'Frances'): [('Hugh', 'son', 'Michael'), ('Michael', 'grandmother', 'Frances')]}, {('Michael', 'grandmother', 'Frances'): [('Michael', 'mother', 'David'), ('David', 'mother', 'Frances')]}]
['son', 'mother', 'mother']