[Louis] treated his brother [Robert] to lunch. [Robert] brought along his daughter, [Michelle]. [Robert] took his daughter [Michelle] to the zoo on Saturday. [Robert]'s wife [Marie] could n't come as she had to work that day.
('Marie', 'Louis')
[Robert] took his daughter [Michelle] to the zoo on Saturday. [Robert]'s wife [Marie] could n't come as she had to work that day. [Louis] treated his brother [Robert] to lunch. [Robert] brought along his daughter, [Michelle].
[{('Marie', 'brother', 'Louis'): [('Marie', 'daughter', 'Michelle'), ('Michelle', 'uncle', 'Louis')]}, {('Michelle', 'uncle', 'Louis'): [('Michelle', 'father', 'Robert'), ('Robert', 'brother', 'Louis')]}, {('Marie', 'daughter', 'Michelle'): [('Marie', 'husband', 'Robert'), ('Robert', 'daughter', 'Michelle')]}]
['husband', 'daughter', 'father', 'brother']