[Wesley] and his wife [Lena] and their son [Irvin] to visit [Irvin]'s grandfather [James] on Sunday because it was his birthday.
('Lena', 'James')
[Wesley] and his wife [Lena] and their son [Irvin] to visit [Irvin]'s grandfather [James] on Sunday because it was his birthday.
[{('Lena', 'father', 'James'): [('Lena', 'son', 'Irvin'), ('Irvin', 'grandfather', 'James')]}, {('Lena', 'son', 'Irvin'): [('Lena', 'husband', 'Wesley'), ('Wesley', 'son', 'Irvin')]}]
['husband', 'son', 'grandfather']