[Milton] and his brother [Dennis] went out for lunch. [Milton] had a burger, and [Dennis] had a chicken sandwich. [Clarence] and his grandson [Milton] went to the mall to get some new clothes for both of them.
('Clarence', 'Dennis')
[Clarence] and his grandson [Milton] went to the mall to get some new clothes for both of them. [Milton] and his brother [Dennis] went out for lunch. [Milton] had a burger, and [Dennis] had a chicken sandwich.
[{('Clarence', 'grandson', 'Dennis'): [('Clarence', 'grandson', 'Milton'), ('Milton', 'brother', 'Dennis')]}]
['grandson', 'brother']