[Dale] and his son [Rich] are going to eat lunch with [Latisha], [Dale]'s grandmother. [Keith] went to the park with his father, [Rich].
('Keith', 'Latisha')
[Keith] went to the park with his father, [Rich]. [Dale] and his son [Rich] are going to eat lunch with [Latisha], [Dale]'s grandmother.
[{('Keith', 'grandmother', 'Latisha'): [('Keith', 'brother', 'Dale'), ('Dale', 'grandmother', 'Latisha')]}, {('Keith', 'brother', 'Dale'): [('Keith', 'father', 'Rich'), ('Rich', 'son', 'Dale')]}]