[Gloria]'s father [Hugh] and grandmother [Frances] took [Hugh]'s sister, [Lena], with them on their catamaran trip.
('Lena', 'Frances')
[Gloria]'s father [Hugh] and grandmother [Frances] took [Hugh]'s sister, [Lena], with them on their catamaran trip.
[{('Lena', 'mother', 'Frances'): [('Lena', 'brother', 'Hugh'), ('Hugh', 'mother', 'Frances')]}, {('Hugh', 'mother', 'Frances'): [('Hugh', 'daughter', 'Gloria'), ('Gloria', 'grandmother', 'Frances')]}]
['brother', 'daughter', 'grandmother']