[John] and his brother [Allan] are constantly trying to one up each other. [Robert]'s wife, [Marie], went to the library with her daughter, [Michelle]. [Allan]'s father, [Robert], bought him some ice cream.
('John', 'Michelle')
[John] and his brother [Allan] are constantly trying to one up each other. [Allan]'s father, [Robert], bought him some ice cream. [Robert]'s wife, [Marie], went to the library with her daughter, [Michelle].
[{('John', 'sister', 'Michelle'): [('John', 'father', 'Robert'), ('Robert', 'daughter', 'Michelle')]}, {('Robert', 'daughter', 'Michelle'): [('Robert', 'wife', 'Marie'), ('Marie', 'daughter', 'Michelle')]}, {('John', 'father', 'Robert'): [('John', 'brother', 'Allan'), ('Allan', 'father', 'Robert')]}]
['brother', 'father', 'wife', 'daughter']