CREATE TABLE table_36924 ("Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "Margin of victory" TEXT, "Runner ( s ) -up" TEXT)

What was the margin of victory at the Texas International Open?
SELECT "Margin of victory" FROM table_36924 WHERE "Tournament" = 'texas international open'
SELECT "Margin of victory" FROM "table_36924" WHERE "Tournament" = 'texas international open'