[Roy] does not know he has a son named [John]. [John] and his sister [Stephanie] went to the ice skating rink. [John] fell down and [Stephanie] laughed at him.
('Roy', 'Stephanie')
[Roy] does not know he has a son named [John]. [John] and his sister [Stephanie] went to the ice skating rink. [John] fell down and [Stephanie] laughed at him.
[{('Roy', 'daughter', 'Stephanie'): [('Roy', 'son', 'John'), ('John', 'sister', 'Stephanie')]}]