[Hugh] went out to lunch with his mother [Frances]. [Hugh] invited his brother [Joshua] to join the, but [Joshua] had to take his son [Clarence] to baseball practice.
('Clarence', 'Frances')
[Hugh] went out to lunch with his mother [Frances]. [Hugh] invited his brother [Joshua] to join the, but [Joshua] had to take his son [Clarence] to baseball practice.
[{('Clarence', 'grandmother', 'Frances'): [('Clarence', 'father', 'Joshua'), ('Joshua', 'mother', 'Frances')]}, {('Joshua', 'mother', 'Frances'): [('Joshua', 'brother', 'Hugh'), ('Hugh', 'mother', 'Frances')]}]
['father', 'brother', 'mother']