CREATE TABLE table_47673 ("Team 1" TEXT, "Agg." TEXT, "Team 2" TEXT, "1st leg" TEXT, "2nd leg" TEXT)

What is 1st Leg, when 2nd Leg is 0-1?
SELECT "1st leg" FROM table_47673 WHERE "2nd leg" = '0-1'
SELECT "1st leg" FROM "table_47673" WHERE "2nd leg" = '0-1'