[Amy] was sewing a sweater for her sister [Lillian]. [Amy] sat anxiously in the airport terminal, waiting to see her son [Dennis] walk through the gate.
('Lillian', 'Dennis')
[Amy] was sewing a sweater for her sister [Lillian]. [Amy] sat anxiously in the airport terminal, waiting to see her son [Dennis] walk through the gate.
[{('Lillian', 'nephew', 'Dennis'): [('Lillian', 'sister', 'Amy'), ('Amy', 'son', 'Dennis')]}]
['sister', 'son']