[Frances] took her daughter [Lena] to see her very first ballet performance. [David] and her daughter [Vanetta] were making dinner yesterday and [David]'s sister [Lena] called and [David] asked her to come over for dinner.
('Vanetta', 'Frances')
[David] and her daughter [Vanetta] were making dinner yesterday and [David]'s sister [Lena] called and [David] asked her to come over for dinner. [Frances] took her daughter [Lena] to see her very first ballet performance.
[{('Vanetta', 'grandmother', 'Frances'): [('Vanetta', 'mother', 'David'), ('David', 'mother', 'Frances')]}, {('David', 'mother', 'Frances'): [('David', 'sister', 'Lena'), ('Lena', 'mother', 'Frances')]}]
['mother', 'sister', 'mother']