[Gladys] and her brother [Thomas] played tennis together. [Gladys]'s sister [Kelly] has an injured leg and watched instead.
('Thomas', 'Kelly')
[Gladys] and her brother [Thomas] played tennis together. [Gladys]'s sister [Kelly] has an injured leg and watched instead.
[{('Thomas', 'sister', 'Kelly'): [('Thomas', 'sister', 'Gladys'), ('Gladys', 'sister', 'Kelly')]}]