[Allan] and his father [Robert] went to the golf course in town on Saturday and had a great time. [Dorothy] went on a vacation with her brother [Robert]. [Erika] and her mother [Tracy] went dress shopping on Saturday. [Allan] asked his aunt [Tracy] what college he should attend.
('Dorothy', 'Erika')
[Dorothy] went on a vacation with her brother [Robert]. [Allan] and his father [Robert] went to the golf course in town on Saturday and had a great time. [Allan] asked his aunt [Tracy] what college he should attend. [Erika] and her mother [Tracy] went dress shopping on Saturday.
[{('Dorothy', 'niece', 'Erika'): [('Dorothy', 'sister', 'Tracy'), ('Tracy', 'daughter', 'Erika')]}, {('Dorothy', 'sister', 'Tracy'): [('Dorothy', 'brother', 'Robert'), ('Robert', 'sister', 'Tracy')]}, {('Robert', 'sister', 'Tracy'): [('Robert', 'son', 'Allan'), ('Allan', 'aunt', 'Tracy')]}]
['brother', 'son', 'aunt', 'daughter']