[Robert] and his son [Ronald] went to the skating rink. [Robert] and his daughter, [Angelica] go to concerts every week. [Ronald] and [Allan] are brothers who look nothing alike. [Antonio] is a great uncle of [Angelica].
('Allan', 'Antonio')
[Ronald] and [Allan] are brothers who look nothing alike. [Robert] and his son [Ronald] went to the skating rink. [Robert] and his daughter, [Angelica] go to concerts every week. [Antonio] is a great uncle of [Angelica].
[{('Allan', 'uncle', 'Antonio'): [('Allan', 'father', 'Robert'), ('Robert', 'brother', 'Antonio')]}, {('Allan', 'father', 'Robert'): [('Allan', 'brother', 'Ronald'), ('Ronald', 'father', 'Robert')]}, {('Robert', 'brother', 'Antonio'): [('Robert', 'daughter', 'Angelica'), ('Angelica', 'uncle', 'Antonio')]}]
['brother', 'father', 'daughter', 'uncle']