[Allan]'s mother, [Marie], was calling him for dinner. [Robert] 'son [Allan] could not believe that his father bought him a coffee machine for his birthday. [Marie] and her brother [Louis] are playing the opening game. [Louis]'s son [Michael] is going to watch them.
('Robert', 'Michael')
[Robert] 'son [Allan] could not believe that his father bought him a coffee machine for his birthday. [Allan]'s mother, [Marie], was calling him for dinner. [Marie] and her brother [Louis] are playing the opening game. [Louis]'s son [Michael] is going to watch them.
[{('Robert', 'nephew', 'Michael'): [('Robert', 'brother', 'Louis'), ('Louis', 'son', 'Michael')]}, {('Robert', 'brother', 'Louis'): [('Robert', 'son', 'Allan'), ('Allan', 'uncle', 'Louis')]}, {('Allan', 'uncle', 'Louis'): [('Allan', 'mother', 'Marie'), ('Marie', 'brother', 'Louis')]}]
['son', 'mother', 'brother', 'son']