[Herman]'s father, [Roy], bought him some ice cream. [Guy] and his father [Herman] played video games all day last Saturday.
('Guy', 'Roy')
[Guy] and his father [Herman] played video games all day last Saturday. [Herman]'s father, [Roy], bought him some ice cream.
[{('Guy', 'grandfather', 'Roy'): [('Guy', 'father', 'Herman'), ('Herman', 'father', 'Roy')]}]