CREATE TABLE table_13206 ("Date" CLOB, "Visitor" CLOB, "Score" CLOB, "Home" CLOB, "Record" CLOB)

Who was the visitor for Chicago Black Hawks on May 6?
SELECT "Visitor" FROM table_13206 WHERE "Home" = 'chicago black hawks' AND "Date" = 'may 6'
SELECT "Visitor" FROM "table_13206" WHERE "Date" = 'may 6' AND "Home" = 'chicago black hawks'