[John] asked his father, [George], to help him with his math homework. [George] could n't, because he was lousy at math himself. [Janet] and her brother [John] were having a wonderful time at Disneyland.
('Janet', 'George')
[Janet] and her brother [John] were having a wonderful time at Disneyland. [John] asked his father, [George], to help him with his math homework. [George] could n't, because he was lousy at math himself.
[{('Janet', 'father', 'George'): [('Janet', 'brother', 'John'), ('John', 'father', 'George')]}]
['brother', 'father']