[Robert] likes playing catch with his sister [Tracy], but his brother [Antonio] never wants to play. [Louis] and his brother [Antonio] watch [Louis]'s daughter [Jennifer] in her school play.
('Tracy', 'Jennifer')
[Robert] likes playing catch with his sister [Tracy], but his brother [Antonio] never wants to play. [Louis] and his brother [Antonio] watch [Louis]'s daughter [Jennifer] in her school play.
[{('Tracy', 'niece', 'Jennifer'): [('Tracy', 'brother', 'Louis'), ('Louis', 'daughter', 'Jennifer')]}, {('Tracy', 'brother', 'Louis'): [('Tracy', 'brother', 'Robert'), ('Robert', 'brother', 'Louis')]}, {('Robert', 'brother', 'Louis'): [('Robert', 'brother', 'Antonio'), ('Antonio', 'brother', 'Louis')]}]
['brother', 'brother', 'brother', 'daughter']