CREATE TABLE table_67989 ("Date" CLOB, "Visitor" CLOB, "Score" CLOB, "Home" CLOB, "Record" CLOB)

What is the name of the visitor team who played home team Chicago Black Hawks on March 20?
SELECT "Visitor" FROM table_67989 WHERE "Home" = 'chicago black hawks' AND "Date" = 'march 20'
SELECT "Visitor" FROM "table_67989" WHERE "Date" = 'march 20' AND "Home" = 'chicago black hawks'