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http://www.playbill.com/multimedia/video/5723/EXTENDED-LOOK-Jeremy-Jordan-Darren-Criss-and-America-Ferrera-Perf­orm-Opening-Doors-in-New-HBO-Documentary-Six-By-Sondheim

Sondhei­m's only autobiographical song.

From Six by Sondheim. If u have HBO, find it, watch it.
Also whether-permitting see
http://hellopoetry.com/poem/lessons-of-us-what-is-your-target-market/