[Fernando] and his father [Ernest] help [Ernest]'s mother [Mary] move into a nursing home.
('Mary', 'Fernando')
[Fernando] and his father [Ernest] help [Ernest]'s mother [Mary] move into a nursing home.
[{('Mary', 'grandson', 'Fernando'): [('Mary', 'son', 'Ernest'), ('Ernest', 'son', 'Fernando')]}]