[Robert] was sad to learn that his sister [Tracy] was not going to make it to dinner like they had planned. [Harold] took his son [Robert] and his daughter [Marie] to the zoo over the weekend. They ate lunch while they were there. [Marie] took her daughter [Angelica] to see a movie on Friday. She let her pick the movie and she enjoyed it very much.
('Angelica', 'Tracy')
[Marie] took her daughter [Angelica] to see a movie on Friday. She let her pick the movie and she enjoyed it very much. [Harold] took his son [Robert] and his daughter [Marie] to the zoo over the weekend. They ate lunch while they were there. [Robert] was sad to learn that his sister [Tracy] was not going to make it to dinner like they had planned.
[{('Angelica', 'aunt', 'Tracy'): [('Angelica', 'mother', 'Marie'), ('Marie', 'sister', 'Tracy')]}, {('Marie', 'sister', 'Tracy'): [('Marie', 'father', 'Harold'), ('Harold', 'daughter', 'Tracy')]}, {('Harold', 'daughter', 'Tracy'): [('Harold', 'son', 'Robert'), ('Robert', 'sister', 'Tracy')]}]
['mother', 'father', 'son', 'sister']