[Cheryl] invited her grandfather [Scott] and her brother [Keith] over for dinner. [Keith] was sad his brother [Dale] could n't join them.
('Scott', 'Dale')
[Cheryl] invited her grandfather [Scott] and her brother [Keith] over for dinner. [Keith] was sad his brother [Dale] could n't join them.
[{('Scott', 'grandson', 'Dale'): [('Scott', 'granddaughter', 'Cheryl'), ('Cheryl', 'brother', 'Dale')]}, {('Cheryl', 'brother', 'Dale'): [('Cheryl', 'brother', 'Keith'), ('Keith', 'brother', 'Dale')]}]