[Mary] picked her granddaughter [Gladys] up from school Monday. [Gladys] 'brother [Thomas] rode the bus home after school.
('Mary', 'Thomas')
[Mary] picked her granddaughter [Gladys] up from school Monday. [Gladys] 'brother [Thomas] rode the bus home after school.
[{('Mary', 'grandson', 'Thomas'): [('Mary', 'granddaughter', 'Gladys'), ('Gladys', 'brother', 'Thomas')]}]