[Michael] and his sister [Marjorie] stood in line at the fair. [Mary] watcher her granddaughter [Marjorie] play the piano at the recital.
('Mary', 'Michael')
[Mary] watcher her granddaughter [Marjorie] play the piano at the recital. [Michael] and his sister [Marjorie] stood in line at the fair.
[{('Mary', 'grandson', 'Michael'): [('Mary', 'granddaughter', 'Marjorie'), ('Marjorie', 'brother', 'Michael')]}]