[Joshua] asked his mother [Frances] to read to him. [Frances] was too busy. [Frances] drove her son [Hugh] to his soccer game. [Hugh] bought his daughter, [Vanetta], flowers.
('Joshua', 'Vanetta')
[Joshua] asked his mother [Frances] to read to him. [Frances] was too busy. [Frances] drove her son [Hugh] to his soccer game. [Hugh] bought his daughter, [Vanetta], flowers.
[{('Joshua', 'niece', 'Vanetta'): [('Joshua', 'brother', 'Hugh'), ('Hugh', 'daughter', 'Vanetta')]}, {('Joshua', 'brother', 'Hugh'): [('Joshua', 'mother', 'Frances'), ('Frances', 'son', 'Hugh')]}]
['mother', 'son', 'daughter']