[Joshua] 'son [Joseph] and [Joseph]'s grandfather [James] went on a cruise together. [Dolores] took her father [Joshua] to watch a movie together.
('Dolores', 'James')
[Dolores] took her father [Joshua] to watch a movie together. [Joshua] 'son [Joseph] and [Joseph]'s grandfather [James] went on a cruise together.
[{('Dolores', 'grandfather', 'James'): [('Dolores', 'father', 'Joshua'), ('Joshua', 'father', 'James')]}, {('Joshua', 'father', 'James'): [('Joshua', 'son', 'Joseph'), ('Joseph', 'grandfather', 'James')]}]
['father', 'son', 'grandfather']