[Jennifer] and her brother [Samuel] played tennis together. [Jennifer]'s sister [Karen] has an injured leg and watched instead. [Samuel] played catch with his dad, [Louis] [Pedro] is picking up his niece [Karen] from school today because her parents are both working.
('Louis', 'Pedro')
[Samuel] played catch with his dad, [Louis] [Jennifer] and her brother [Samuel] played tennis together. [Jennifer]'s sister [Karen] has an injured leg and watched instead. [Pedro] is picking up his niece [Karen] from school today because her parents are both working.
[{('Louis', 'brother', 'Pedro'): [('Louis', 'daughter', 'Karen'), ('Karen', 'uncle', 'Pedro')]}, {('Louis', 'daughter', 'Karen'): [('Louis', 'son', 'Samuel'), ('Samuel', 'sister', 'Karen')]}, {('Samuel', 'sister', 'Karen'): [('Samuel', 'sister', 'Jennifer'), ('Jennifer', 'sister', 'Karen')]}]
['son', 'sister', 'sister', 'uncle']