[Antonio]'s father [Harold] is going to coach the team this year. [Robert] invited his brother, [Antonio], and his sister, [Dorothy], over for dinner. [Dorothy] could n't make it, but she sent her son [Jeffrey] over in her place so that the food would n't be wasted.
('Harold', 'Jeffrey')
[Antonio]'s father [Harold] is going to coach the team this year. [Robert] invited his brother, [Antonio], and his sister, [Dorothy], over for dinner. [Dorothy] could n't make it, but she sent her son [Jeffrey] over in her place so that the food would n't be wasted.
[{('Harold', 'grandson', 'Jeffrey'): [('Harold', 'daughter', 'Dorothy'), ('Dorothy', 'son', 'Jeffrey')]}, {('Harold', 'daughter', 'Dorothy'): [('Harold', 'son', 'Robert'), ('Robert', 'sister', 'Dorothy')]}, {('Harold', 'son', 'Robert'): [('Harold', 'son', 'Antonio'), ('Antonio', 'brother', 'Robert')]}]
['son', 'brother', 'sister', 'son']