[Dorothy] talks to her sister [Beverly] on the phone each night before bed. [Robert] is lucky if he talks to his sister [Dorothy] once a month. [Allan]'s sister, [Michelle], was so happy to have him home. He was home from college. [Allan]'s father [Robert] is going to coach the team this year.
('Beverly', 'Michelle')
[Dorothy] talks to her sister [Beverly] on the phone each night before bed. [Robert] is lucky if he talks to his sister [Dorothy] once a month. [Allan]'s father [Robert] is going to coach the team this year. [Allan]'s sister, [Michelle], was so happy to have him home. He was home from college.
[{('Beverly', 'niece', 'Michelle'): [('Beverly', 'brother', 'Robert'), ('Robert', 'daughter', 'Michelle')]}, {('Beverly', 'brother', 'Robert'): [('Beverly', 'sister', 'Dorothy'), ('Dorothy', 'brother', 'Robert')]}, {('Robert', 'daughter', 'Michelle'): [('Robert', 'son', 'Allan'), ('Allan', 'sister', 'Michelle')]}]
['sister', 'brother', 'son', 'sister']