[Herman] and his son [Guy] went to the park to look for different kinds of birds. [Herman] went to visit his sister [Martha] to the hospital last week.
('Guy', 'Martha')
[Herman] and his son [Guy] went to the park to look for different kinds of birds. [Herman] went to visit his sister [Martha] to the hospital last week.
[{('Guy', 'aunt', 'Martha'): [('Guy', 'father', 'Herman'), ('Herman', 'sister', 'Martha')]}]