[Nicolas] is in the sixth grade. He looks up to his sister [Belva], who is in the seventh. [Belva] called her grandfather [Clarence] on the phone, and asked if he would be visiting her soon. [Clarence] told her he'd be over tomorrow.
('Nicolas', 'Clarence')
[Nicolas] is in the sixth grade. He looks up to his sister [Belva], who is in the seventh. [Belva] called her grandfather [Clarence] on the phone, and asked if he would be visiting her soon. [Clarence] told her he'd be over tomorrow.
[{('Nicolas', 'grandfather', 'Clarence'): [('Nicolas', 'sister', 'Belva'), ('Belva', 'grandfather', 'Clarence')]}]
['sister', 'grandfather']