[Marie] and her son, [Mario], decorated mugs at the craft fair together. [Harold] wants to see his daughter, [Marie], so he invites her to lunch. [Marie] brings her son [John], and his brother [Mario].
('Marie', 'Harold')
[Marie] and her son, [Mario], decorated mugs at the craft fair together. [Harold] wants to see his daughter, [Marie], so he invites her to lunch. [Marie] brings her son [John], and his brother [Mario].
[{('Marie', 'father', 'Harold'): [('Marie', 'son', 'Mario'), ('Mario', 'grandfather', 'Harold')]}, {('Mario', 'grandfather', 'Harold'): [('Mario', 'brother', 'John'), ('John', 'grandfather', 'Harold')]}, {('Mario', 'brother', 'John'): [('Mario', 'mother', 'Marie'), ('Marie', 'son', 'John')]}]
['son', 'mother', 'son', 'grandfather']