[Thomas] was having a cookout one day, and invited his sister [Gladys]. [Gladys]'s brother [Newton] drove them to the cookout.
('Newton', 'Thomas')
[Thomas] was having a cookout one day, and invited his sister [Gladys]. [Gladys]'s brother [Newton] drove them to the cookout.
[{('Newton', 'brother', 'Thomas'): [('Newton', 'sister', 'Gladys'), ('Gladys', 'brother', 'Thomas')]}]