CREATE TABLE table_77921 ("Team 1" TEXT, "Agg." TEXT, "Team 2" TEXT, "1st leg" TEXT, "2nd leg" TEXT)

What is the 2nd leg of the Comunicaciones team?
SELECT "2nd leg" FROM table_77921 WHERE "Team 1" = 'comunicaciones'
SELECT "2nd leg" FROM "table_77921" WHERE "Team 1" = 'comunicaciones'