[William] 'son, [Paul], was late meeting his grandfather, [Joseph]. [William] went to his brother [Marvin]'s Birthday party
[William] went to his brother [Marvin]'s Birthday party [William] 'son, [Paul], was late meeting his grandfather, [Joseph].
[{('Marvin', 'father', 'Joseph'): [('Marvin', 'brother', 'William'), ('William', 'father', 'Joseph')]}, {('William', 'father', 'Joseph'): [('William', 'son', 'Paul'), ('Paul', 'grandfather', 'Joseph')]}]