[Aaron] went to [Tracy]'s house for dinner. [Bettie] took her uncle [Pedro] to the grocery store. [Tracy]'s husband, [Antonio], could n't wait to take his daughter, [Bettie], riding for the first time.
('Aaron', 'Pedro')
[Aaron] went to [Tracy]'s house for dinner. [Tracy]'s husband, [Antonio], could n't wait to take his daughter, [Bettie], riding for the first time. [Bettie] took her uncle [Pedro] to the grocery store.
[{('Aaron', 'uncle', 'Pedro'): [('Aaron', 'mother', 'Tracy'), ('Tracy', 'brother', 'Pedro')]}, {('Tracy', 'brother', 'Pedro'): [('Tracy', 'daughter', 'Bettie'), ('Bettie', 'uncle', 'Pedro')]}, {('Tracy', 'daughter', 'Bettie'): [('Tracy', 'husband', 'Antonio'), ('Antonio', 'daughter', 'Bettie')]}]
['mother', 'husband', 'daughter', 'uncle']