[Louis] and his father [Harold] were cooking dinner for the holiday at their house. [Harold] invited his daughter [Tracy] to help them. [Dorothy] and her son [James] went to her sister [Tracy]
('Louis', 'James')
[Louis] and his father [Harold] were cooking dinner for the holiday at their house. [Harold] invited his daughter [Tracy] to help them. [Dorothy] and her son [James] went to her sister [Tracy]
[{('Louis', 'nephew', 'James'): [('Louis', 'sister', 'Dorothy'), ('Dorothy', 'son', 'James')]}, {('Louis', 'sister', 'Dorothy'): [('Louis', 'sister', 'Tracy'), ('Tracy', 'sister', 'Dorothy')]}, {('Louis', 'sister', 'Tracy'): [('Louis', 'father', 'Harold'), ('Harold', 'daughter', 'Tracy')]}]
['father', 'daughter', 'sister', 'son']