[Lois] is one of my favorite students. She is the younger sister of [Ernest], who I taught last year, [Lois]'s mom, [Mary], has recently taken art classes.
('Ernest', 'Mary')
[Lois] is one of my favorite students. She is the younger sister of [Ernest], who I taught last year, [Lois]'s mom, [Mary], has recently taken art classes.
[{('Ernest', 'mother', 'Mary'): [('Ernest', 'sister', 'Lois'), ('Lois', 'mother', 'Mary')]}]