[Mary] and her daughter [Martha] went out to dinner. [Martha] and her daughter [Laura] went out for ice cream. [Martha] got a cone and [Laura] got a sundae.
('Mary', 'Laura')
[Mary] and her daughter [Martha] went out to dinner. [Martha] and her daughter [Laura] went out for ice cream. [Martha] got a cone and [Laura] got a sundae.
[{('Mary', 'granddaughter', 'Laura'): [('Mary', 'daughter', 'Martha'), ('Martha', 'daughter', 'Laura')]}]