[Robert] and kyle are brothers. They went out to eat with [Louis]'s sister [Tracy]. [Pedro] does n't trust just anybody to watch his daughter [Heather] when he's away. [Pedro]'s sister [Tracy] is about the only person he ever leaves his daughter with.
('Robert', 'Heather')
[Robert] and kyle are brothers. They went out to eat with [Louis]'s sister [Tracy]. [Pedro] does n't trust just anybody to watch his daughter [Heather] when he's away. [Pedro]'s sister [Tracy] is about the only person he ever leaves his daughter with.
[{('Robert', 'niece', 'Heather'): [('Robert', 'brother', 'Pedro'), ('Pedro', 'daughter', 'Heather')]}, {('Robert', 'brother', 'Pedro'): [('Robert', 'sister', 'Tracy'), ('Tracy', 'brother', 'Pedro')]}, {('Robert', 'sister', 'Tracy'): [('Robert', 'brother', 'Louis'), ('Louis', 'sister', 'Tracy')]}]
['brother', 'sister', 'brother', 'daughter']