[Hugh]'s wife, [David], went to a gas station to check on the gas prices [James] loved teaching his son, [Hugh], baseball. [David] talks to her son [Bobby] every day.
('James', 'Bobby')
[James] loved teaching his son, [Hugh], baseball. [Hugh]'s wife, [David], went to a gas station to check on the gas prices [David] talks to her son [Bobby] every day.
[{('James', 'grandson', 'Bobby'): [('James', 'son', 'Hugh'), ('Hugh', 'son', 'Bobby')]}, {('Hugh', 'son', 'Bobby'): [('Hugh', 'wife', 'David'), ('David', 'son', 'Bobby')]}]
['son', 'wife', 'son']