CREATE TABLE table_6193 ("Team 1" CLOB, "Agg." CLOB, "Team 2" CLOB, "1st leg" CLOB, "2nd leg" CLOB)

What is the 1st leg that has a 2nd leg of 0 0 of olympique khouribga?
SELECT "1st leg" FROM table_6193 WHERE "2nd leg" = '0–0' AND "Team 1" = 'olympique khouribga'
SELECT "1st leg" FROM "table_6193" WHERE "2nd leg" = '0–0' AND "Team 1" = 'olympique khouribga'