[Hugh] and his wife, [David], decided to host a party. [David] asked her husband [Hugh] to first called her father, [James], to invite him to help out. [Hugh] is an engineer who loves to take his son [Bobby] to the science museum to help him learn about the world
('James', 'Bobby')
[Hugh] and his wife, [David], decided to host a party. [David] asked her husband [Hugh] to first called her father, [James], to invite him to help out. [Hugh] is an engineer who loves to take his son [Bobby] to the science museum to help him learn about the world
[{('James', 'grandson', 'Bobby'): [('James', 'daughter', 'David'), ('David', 'son', 'Bobby')]}, {('David', 'son', 'Bobby'): [('David', 'husband', 'Hugh'), ('Hugh', 'son', 'Bobby')]}]
['daughter', 'husband', 'son']