[Ernest] and his sister [Martha] stood in line at the fair. [Fernando] went to the park with his father, [Ernest].
('Martha', 'Fernando')
[Ernest] and his sister [Martha] stood in line at the fair. [Fernando] went to the park with his father, [Ernest].
[{('Martha', 'nephew', 'Fernando'): [('Martha', 'brother', 'Ernest'), ('Ernest', 'son', 'Fernando')]}]