[June] called [Belva], her sister, to see if she wanted to go out to eat. [Belva] and her brother [Nicolas] sat down together to clip coupons.
('Nicolas', 'June')
[Belva] and her brother [Nicolas] sat down together to clip coupons. [June] called [Belva], her sister, to see if she wanted to go out to eat.
[{('Nicolas', 'sister', 'June'): [('Nicolas', 'sister', 'Belva'), ('Belva', 'sister', 'June')]}]
['sister', 'sister']