[Pedro] took his brother [Antonio] to get lunch at a local diner. [Antonio] love his brother [Louis]. They are always playing together. [Cheryl] invited her father [Pedro] to dinner. [Marie] was playing in the sandbox with her brother [Louis].
('Marie', 'Cheryl')
[Marie] was playing in the sandbox with her brother [Louis]. [Antonio] love his brother [Louis]. They are always playing together. [Pedro] took his brother [Antonio] to get lunch at a local diner. [Cheryl] invited her father [Pedro] to dinner.
[{('Marie', 'niece', 'Cheryl'): [('Marie', 'brother', 'Pedro'), ('Pedro', 'daughter', 'Cheryl')]}, {('Marie', 'brother', 'Pedro'): [('Marie', 'brother', 'Antonio'), ('Antonio', 'brother', 'Pedro')]}, {('Marie', 'brother', 'Antonio'): [('Marie', 'brother', 'Louis'), ('Louis', 'brother', 'Antonio')]}]
['brother', 'brother', 'brother', 'daughter']