[Andrea] gave her brother [Clarence] a new sweater for Christmas. [Joshua] took his father, [James], to a baseball game downtown. They invited [Clarence] along, because [Joshua] is [Clarence]'s father.
('Andrea', 'James')
[Andrea] gave her brother [Clarence] a new sweater for Christmas. [Joshua] took his father, [James], to a baseball game downtown. They invited [Clarence] along, because [Joshua] is [Clarence]'s father.
[{('Andrea', 'grandfather', 'James'): [('Andrea', 'brother', 'Clarence'), ('Clarence', 'grandfather', 'James')]}, {('Clarence', 'grandfather', 'James'): [('Clarence', 'father', 'Joshua'), ('Joshua', 'father', 'James')]}]
['brother', 'father', 'father']