[Martha] spent the whole month of January at her grandfather [James]'s house. [Lena] and her daughter [Martha] went out for ice cream. [Lena] got a cone and [Martha] got a sundae. [Charles] loves his mother very much. Her name is [Lena].
('Charles', 'James')
[Charles] loves his mother very much. Her name is [Lena]. [Lena] and her daughter [Martha] went out for ice cream. [Lena] got a cone and [Martha] got a sundae. [Martha] spent the whole month of January at her grandfather [James]'s house.
[{('Charles', 'grandfather', 'James'): [('Charles', 'sister', 'Martha'), ('Martha', 'grandfather', 'James')]}, {('Charles', 'sister', 'Martha'): [('Charles', 'mother', 'Lena'), ('Lena', 'daughter', 'Martha')]}]
['mother', 'daughter', 'grandfather']