CREATE TABLE table_74729 ("Date" CLOB, "Tournament" CLOB, "Winning score" CLOB, "Margin of victory" CLOB, "Runner ( s ) -up" CLOB)

What was the margin of victory on Apr 23, 1967?
SELECT "Margin of victory" FROM table_74729 WHERE "Date" = 'apr 23, 1967'
SELECT "Margin of victory" FROM "table_74729" WHERE "Date" = 'apr 23, 1967'