[Pedro] is a sibling of [Robert]. [Robert] asked his daughter, [Angelica], why she was crying. [Angelica] told him her sister, [Lizzie], had pulled her hair. [Lizzie]'s uncle [Antonio] was looking forward to visiting for the summer.
('Pedro', 'Antonio')
[Pedro] is a sibling of [Robert]. [Robert] asked his daughter, [Angelica], why she was crying. [Angelica] told him her sister, [Lizzie], had pulled her hair. [Lizzie]'s uncle [Antonio] was looking forward to visiting for the summer.
[{('Pedro', 'brother', 'Antonio'): [('Pedro', 'brother', 'Robert'), ('Robert', 'brother', 'Antonio')]}, {('Robert', 'brother', 'Antonio'): [('Robert', 'daughter', 'Lizzie'), ('Lizzie', 'uncle', 'Antonio')]}, {('Robert', 'daughter', 'Lizzie'): [('Robert', 'daughter', 'Angelica'), ('Angelica', 'sister', 'Lizzie')]}]
['brother', 'daughter', 'sister', 'uncle']