[Frances] and her husband [James] will be celebrating 30 years of marriage this month. [James] took his son [Joshua] out to dinner to celebrate his promotion. [Joshua] brought his son, [Joseph], along to celebrate.
('Frances', 'Joseph')
[Frances] and her husband [James] will be celebrating 30 years of marriage this month. [James] took his son [Joshua] out to dinner to celebrate his promotion. [Joshua] brought his son, [Joseph], along to celebrate.
[{('Frances', 'grandson', 'Joseph'): [('Frances', 'husband', 'James'), ('James', 'grandson', 'Joseph')]}, {('James', 'grandson', 'Joseph'): [('James', 'son', 'Joshua'), ('Joshua', 'son', 'Joseph')]}]
['husband', 'son', 'son']