[Joshua] was so excited to give his mother, [Katherine], a really nice card for Mother's Day. He loves her very much. [Katherine] is getting married. She is looking forward to her sister, [Helen], attending. They have n't seen each other since [Helen] relocated to California with her husband 3 years ago. [John] went to pick up his son [Joshua] from the baseball practice.
('John', 'Helen')
[John] went to pick up his son [Joshua] from the baseball practice. [Joshua] was so excited to give his mother, [Katherine], a really nice card for Mother's Day. He loves her very much. [Katherine] is getting married. She is looking forward to her sister, [Helen], attending. They have n't seen each other since [Helen] relocated to California with her husband 3 years ago.
[{('John', 'sister', 'Helen'): [('John', 'son', 'Joshua'), ('Joshua', 'aunt', 'Helen')]}, {('Joshua', 'aunt', 'Helen'): [('Joshua', 'mother', 'Katherine'), ('Katherine', 'sister', 'Helen')]}]