CREATE TABLE table_21156 ("Player" TEXT, "GP" FLOAT, "K. Ret." FLOAT, "KR Yds" FLOAT, "KR Avg." TEXT, "KR TD" FLOAT, "KR LG" FLOAT, "P. Ret." FLOAT, "PR Yds" FLOAT, "PR Avg." TEXT, "PR TD" FLOAT, "PR LG" FLOAT, "MFG Ret." FLOAT, "MFG Yds" FLOAT, "MFG Avg." TEXT, "MFG LG" FLOAT, "MFG TD" FLOAT)

What is the kr td when mfg lg is 64?
SELECT "KR TD" FROM table_21156 WHERE "MFG LG" = '64'
SELECT "KR TD" FROM "table_21156" WHERE "MFG LG" = '64'