[David] invited her father [James] to dinner. [Juanita] went to the lake to meet her father [Joshua] and her grandfather [James].
('Joshua', 'David')
[Juanita] went to the lake to meet her father [Joshua] and her grandfather [James]. [David] invited her father [James] to dinner.
[{('Joshua', 'sister', 'David'): [('Joshua', 'father', 'James'), ('James', 'daughter', 'David')]}, {('Joshua', 'father', 'James'): [('Joshua', 'daughter', 'Juanita'), ('Juanita', 'grandfather', 'James')]}]
['daughter', 'grandfather', 'daughter']