CREATE TABLE table_38420 ("Date" TEXT, "Visitor" TEXT, "Score" TEXT, "Home" TEXT, "Record" TEXT)

What team did the Chicago Black Hawks visit on April 20?
SELECT "Home" FROM table_38420 WHERE "Visitor" = 'chicago black hawks' AND "Date" = 'april 20'
SELECT "Home" FROM "table_38420" WHERE "Date" = 'april 20' AND "Visitor" = 'chicago black hawks'