[Martha]'s grandmother, [Frances], and her brother, [Charles], went to the beach last weekend. [Charles]'s father, [Wesley], stayed home to work on the truck.
('Wesley', 'Frances')
[Martha]'s grandmother, [Frances], and her brother, [Charles], went to the beach last weekend. [Charles]'s father, [Wesley], stayed home to work on the truck.
[{('Wesley', 'mother', 'Frances'): [('Wesley', 'son', 'Charles'), ('Charles', 'grandmother', 'Frances')]}, {('Charles', 'grandmother', 'Frances'): [('Charles', 'sister', 'Martha'), ('Martha', 'grandmother', 'Frances')]}]
['son', 'sister', 'grandmother']