[Scott] was happy that his son [Rich] was doing well in college. [Rich] made a sandwich for his son [Keith]. [Keith]'s brother [Tom] ate an apple instead.
('Scott', 'Tom')
[Scott] was happy that his son [Rich] was doing well in college. [Rich] made a sandwich for his son [Keith]. [Keith]'s brother [Tom] ate an apple instead.
[{('Scott', 'grandson', 'Tom'): [('Scott', 'grandson', 'Keith'), ('Keith', 'brother', 'Tom')]}, {('Scott', 'grandson', 'Keith'): [('Scott', 'son', 'Rich'), ('Rich', 'son', 'Keith')]}]