[Wesley] took his son [Irvin] to the zoo yesterday because he took his daughter [Mildred] last week [Mildred] is taking her grandfather [James] shopping.
('Irvin', 'James')
[Wesley] took his son [Irvin] to the zoo yesterday because he took his daughter [Mildred] last week [Mildred] is taking her grandfather [James] shopping.
[{('Irvin', 'grandfather', 'James'): [('Irvin', 'sister', 'Mildred'), ('Mildred', 'grandfather', 'James')]}, {('Irvin', 'sister', 'Mildred'): [('Irvin', 'father', 'Wesley'), ('Wesley', 'daughter', 'Mildred')]}]
['father', 'daughter', 'grandfather']