[Robert] 'son [Ronald] could not believe that his father bought him a coffee machine for his birthday. [Marie] picked up her son [Ronald] from the mall [Marie], her daughter, [Lizzie], and [Lizzie]'s husband, [Allan], all went to the theater to see a play. The women had a good time but [Allan] was bored.
('Robert', 'Allan')
[Robert] 'son [Ronald] could not believe that his father bought him a coffee machine for his birthday. [Marie] picked up her son [Ronald] from the mall [Marie], her daughter, [Lizzie], and [Lizzie]'s husband, [Allan], all went to the theater to see a play. The women had a good time but [Allan] was bored.
[{('Robert', 'son-in-law', 'Allan'): [('Robert', 'daughter', 'Lizzie'), ('Lizzie', 'husband', 'Allan')]}, {('Robert', 'daughter', 'Lizzie'): [('Robert', 'son', 'Ronald'), ('Ronald', 'sister', 'Lizzie')]}, {('Ronald', 'sister', 'Lizzie'): [('Ronald', 'mother', 'Marie'), ('Marie', 'daughter', 'Lizzie')]}]
['son', 'mother', 'daughter', 'husband']