[Thomas] loves his mother [Lynn] very much. [Clarence] who is [Lynn]'s son made the basketball team. [Frances] who is the grandmother of [Clarence] will attend the game.
('Thomas', 'Frances')
[Thomas] loves his mother [Lynn] very much. [Clarence] who is [Lynn]'s son made the basketball team. [Frances] who is the grandmother of [Clarence] will attend the game.
[{('Thomas', 'grandmother', 'Frances'): [('Thomas', 'brother', 'Clarence'), ('Clarence', 'grandmother', 'Frances')]}, {('Thomas', 'brother', 'Clarence'): [('Thomas', 'mother', 'Lynn'), ('Lynn', 'son', 'Clarence')]}]
['mother', 'son', 'grandmother']