President Barack Obama, right, presents the Presidential Medal of Freedom to composer Stephen Sondheim during a ceremony in the East Room of the White House, on, Nov. 24, 2015

Video. Stephen Sondheim, musical theatre legend and writer of 'Sweeney Todd', dies aged 91

Sondheim influenced several generations of theatre songwriters, particularly with such landmark musicals as “Company,” “Follies” and “Sweeney Todd."

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