[Robert] was happy that his son [Allan] was doing well in college. [Louis] and his son [Wayne] went to the skating rink. [Beverly] asked her son [Wayne] to help her fix her television. [Robert] and [Louis] are brothers who look nothing alike.
('Beverly', 'Allan')
[Beverly] asked her son [Wayne] to help her fix her television. [Louis] and his son [Wayne] went to the skating rink. [Robert] and [Louis] are brothers who look nothing alike. [Robert] was happy that his son [Allan] was doing well in college.
[{('Beverly', 'nephew', 'Allan'): [('Beverly', 'brother', 'Robert'), ('Robert', 'son', 'Allan')]}, {('Beverly', 'brother', 'Robert'): [('Beverly', 'son', 'Wayne'), ('Wayne', 'uncle', 'Robert')]}, {('Wayne', 'uncle', 'Robert'): [('Wayne', 'father', 'Louis'), ('Louis', 'brother', 'Robert')]}]
['son', 'father', 'brother', 'son']