[Cheryl] is a sister of [Jeffrey]. [Erika]'s uncle [Pedro] was looking forward to visiting for the summer. [Tracy] and her daughter [Erika] went out for ice cream. [Tracy] got a cone and [Erika] got a sundae. [Jeffrey]'s father [Pedro] is going to coach the team this year.
('Tracy', 'Cheryl')
[Tracy] and her daughter [Erika] went out for ice cream. [Tracy] got a cone and [Erika] got a sundae. [Erika]'s uncle [Pedro] was looking forward to visiting for the summer. [Jeffrey]'s father [Pedro] is going to coach the team this year. [Cheryl] is a sister of [Jeffrey].
[{('Tracy', 'niece', 'Cheryl'): [('Tracy', 'brother', 'Pedro'), ('Pedro', 'daughter', 'Cheryl')]}, {('Tracy', 'brother', 'Pedro'): [('Tracy', 'daughter', 'Erika'), ('Erika', 'uncle', 'Pedro')]}, {('Pedro', 'daughter', 'Cheryl'): [('Pedro', 'son', 'Jeffrey'), ('Jeffrey', 'sister', 'Cheryl')]}]
['daughter', 'uncle', 'son', 'sister']