[Robert] and his wife [Marie] love being outdoors. One weekend, [Robert] took his daughter, [Elsie], out on a camping trip. [Robert] loved his two children, [John] and [Elsie].
('Marie', 'John')
[Robert] and his wife [Marie] love being outdoors. One weekend, [Robert] took his daughter, [Elsie], out on a camping trip. [Robert] loved his two children, [John] and [Elsie].
[{('Marie', 'son', 'John'): [('Marie', 'daughter', 'Elsie'), ('Elsie', 'brother', 'John')]}, {('Elsie', 'brother', 'John'): [('Elsie', 'father', 'Robert'), ('Robert', 'son', 'John')]}, {('Marie', 'daughter', 'Elsie'): [('Marie', 'husband', 'Robert'), ('Robert', 'daughter', 'Elsie')]}]
['husband', 'daughter', 'father', 'son']