[Mary] and her daughter [Lois] went out to dinner. [Lois] was so excited to learn that her son [Arthur] got accepted into college.
('Mary', 'Arthur')
[Mary] and her daughter [Lois] went out to dinner. [Lois] was so excited to learn that her son [Arthur] got accepted into college.
[{('Mary', 'grandson', 'Arthur'): [('Mary', 'daughter', 'Lois'), ('Lois', 'son', 'Arthur')]}]