CREATE TABLE table_78194 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

Which home team played the away team of collingwood?
SELECT "Home team" FROM table_78194 WHERE "Away team" = 'collingwood'
SELECT "Home team" FROM "table_78194" WHERE "Away team" = 'collingwood'