[Bobby] took his sister [Gloria] out to dinner for her birthday. [Marie] was pleased to receive a birthday card from her grandmother, [Frances]. [Bobby] and his sister [Marie] love to play video games.
('Gloria', 'Frances')
[Bobby] took his sister [Gloria] out to dinner for her birthday. [Bobby] and his sister [Marie] love to play video games. [Marie] was pleased to receive a birthday card from her grandmother, [Frances].
[{('Gloria', 'grandmother', 'Frances'): [('Gloria', 'sister', 'Marie'), ('Marie', 'grandmother', 'Frances')]}, {('Gloria', 'sister', 'Marie'): [('Gloria', 'brother', 'Bobby'), ('Bobby', 'sister', 'Marie')]}]
['brother', 'sister', 'grandmother']