[Robert] took his son [Ronald] to school this morning because he missed the bus. [Marie] could n't wait for the surprise birthday party that she was throwing for her brother [Antonio] next weekend. [Harold] 'son [Antonio] could not believe that his father bought him a coffee machine for his birthday. [Robert] is making a very special present for his wife [Marie].
('Harold', 'Ronald')
[Harold] 'son [Antonio] could not believe that his father bought him a coffee machine for his birthday. [Marie] could n't wait for the surprise birthday party that she was throwing for her brother [Antonio] next weekend. [Robert] is making a very special present for his wife [Marie]. [Robert] took his son [Ronald] to school this morning because he missed the bus.
[{('Harold', 'grandson', 'Ronald'): [('Harold', 'daughter', 'Marie'), ('Marie', 'son', 'Ronald')]}, {('Harold', 'daughter', 'Marie'): [('Harold', 'son', 'Antonio'), ('Antonio', 'sister', 'Marie')]}, {('Marie', 'son', 'Ronald'): [('Marie', 'husband', 'Robert'), ('Robert', 'son', 'Ronald')]}]
['son', 'sister', 'husband', 'son']