[Joseph] and his father [Joshua] played video games all day last Saturday. [Joshua] and his brother [Hugh] played at jacks. [James] and his son [Hugh] went to the skating rink.
('Joseph', 'James')
[Joseph] and his father [Joshua] played video games all day last Saturday. [Joshua] and his brother [Hugh] played at jacks. [James] and his son [Hugh] went to the skating rink.
[{('Joseph', 'grandfather', 'James'): [('Joseph', 'father', 'Joshua'), ('Joshua', 'father', 'James')]}, {('Joshua', 'father', 'James'): [('Joshua', 'brother', 'Hugh'), ('Hugh', 'father', 'James')]}]
['father', 'brother', 'father']