[Laura] invited her grandfather [Harold] to the movies last weekend. [Harold] and [Laura] had a great time together. [Antonio] took his daughter [Erika] out for ice cream. His other daughter, [Laura], was still in school and could not go. [Harold] was happy that his son [Robert] was doing well in college.
('Erika', 'Robert')
[Antonio] took his daughter [Erika] out for ice cream. His other daughter, [Laura], was still in school and could not go. [Laura] invited her grandfather [Harold] to the movies last weekend. [Harold] and [Laura] had a great time together. [Harold] was happy that his son [Robert] was doing well in college.
[{('Erika', 'uncle', 'Robert'): [('Erika', 'father', 'Antonio'), ('Antonio', 'brother', 'Robert')]}, {('Antonio', 'brother', 'Robert'): [('Antonio', 'father', 'Harold'), ('Harold', 'son', 'Robert')]}, {('Antonio', 'father', 'Harold'): [('Antonio', 'daughter', 'Laura'), ('Laura', 'grandfather', 'Harold')]}]
['father', 'daughter', 'grandfather', 'son']