[Lillian] needed to go to the store. [Lillian] asked her sister [Amy] for a ride. [Wayne]'s sister, [Amy], participated in the dance contest.
('Wayne', 'Lillian')
[Wayne]'s sister, [Amy], participated in the dance contest. [Lillian] needed to go to the store. [Lillian] asked her sister [Amy] for a ride.
[{('Wayne', 'sister', 'Lillian'): [('Wayne', 'sister', 'Amy'), ('Amy', 'sister', 'Lillian')]}]
['sister', 'sister']