[Mary]'s son, [Ernest], recently started a pawn shop. [Ernest] is helping his son study. His name is [Newton].
('Mary', 'Newton')
[Mary]'s son, [Ernest], recently started a pawn shop. [Ernest] is helping his son study. His name is [Newton].
[{('Mary', 'grandson', 'Newton'): [('Mary', 'son', 'Ernest'), ('Ernest', 'son', 'Newton')]}]