[Michael] and his siblings [Brandon] and [Vanetta] planned a retirement party for [Vanetta]'s grandmother [Frances].
('Michael', 'Frances')
[Michael] and his siblings [Brandon] and [Vanetta] planned a retirement party for [Vanetta]'s grandmother [Frances].
[{('Michael', 'grandmother', 'Frances'): [('Michael', 'sister', 'Vanetta'), ('Vanetta', 'grandmother', 'Frances')]}, {('Michael', 'sister', 'Vanetta'): [('Michael', 'brother', 'Brandon'), ('Brandon', 'sister', 'Vanetta')]}]
['brother', 'sister', 'grandmother']