[Roy] took his daughter [Martha] out for ice cream. His other daughter, [Lois], was still in school and could not go.
('Martha', 'Lois')
[Roy] took his daughter [Martha] out for ice cream. His other daughter, [Lois], was still in school and could not go.
[{('Martha', 'sister', 'Lois'): [('Martha', 'father', 'Roy'), ('Roy', 'daughter', 'Lois')]}]