CREATE TABLE table_11944 ("Year" FLOAT, "Award" CLOB, "Category" CLOB, "Nominee" CLOB, "Result" CLOB)

What year was there a Tony award category of Best Revival of a Musical?
SELECT "Year" FROM table_11944 WHERE "Award" = 'tony award' AND "Category" = 'best revival of a musical'
SELECT "Year" FROM "table_11944" WHERE "Award" = 'tony award' AND "Category" = 'best revival of a musical'