[Tina], her husband, [Charles], and her brother, [Irvin], went to the beach. [Irvin]'s mother [Lena] came too, but she stayed in the shade because she burns easily.
('Charles', 'Lena')
[Tina], her husband, [Charles], and her brother, [Irvin], went to the beach. [Irvin]'s mother [Lena] came too, but she stayed in the shade because she burns easily.
[{('Charles', 'mother-in-law', 'Lena'): [('Charles', 'wife', 'Tina'), ('Tina', 'mother', 'Lena')]}, {('Tina', 'mother', 'Lena'): [('Tina', 'brother', 'Irvin'), ('Irvin', 'mother', 'Lena')]}]
['wife', 'brother', 'mother']