CREATE TABLE table_64504 ("Year" FLOAT, "Title" TEXT, "Hangul / Japanese" TEXT, "Role" TEXT, "Network" TEXT, "Genre" TEXT)

What's the title when the genre is drama and network of KBS2 happening before 2011?
SELECT "Title" FROM table_64504 WHERE "Year" < '2011' AND "Network" = 'kbs2' AND "Genre" = 'drama'
SELECT "Title" FROM "table_64504" WHERE "Genre" = 'drama' AND "Network" = 'kbs2' AND "Year" < '2011'