[Joshua]'s son [Joseph] and [Joseph]'s grandmother [Frances] are playing cards. [Wesley] tripped his brother [Joshua] in the living room.
('Wesley', 'Frances')
[Wesley] tripped his brother [Joshua] in the living room. [Joshua]'s son [Joseph] and [Joseph]'s grandmother [Frances] are playing cards.
[{('Wesley', 'mother', 'Frances'): [('Wesley', 'brother', 'Joshua'), ('Joshua', 'mother', 'Frances')]}, {('Joshua', 'mother', 'Frances'): [('Joshua', 'son', 'Joseph'), ('Joseph', 'grandmother', 'Frances')]}]
['brother', 'son', 'grandmother']