CREATE TABLE table_42506 ("Tie no" CLOB, "Home team" CLOB, "Score" CLOB, "Away team" CLOB, "Date" CLOB)

Which home team played in the matchup with an away team of Liverpool?
SELECT "Home team" FROM table_42506 WHERE "Away team" = 'liverpool'
SELECT "Home team" FROM "table_42506" WHERE "Away team" = 'liverpool'