CREATE TABLE table_23113 ("SP" TEXT, "Number" FLOAT, "Horse" TEXT, "Age" FLOAT, "Handicap  ( st-lb ) " TEXT, "Jockey" TEXT, "Trainer" TEXT, "Owner" TEXT, "Colours" TEXT, "Finishing position" TEXT)

What colors does David Langdon use?
SELECT "Colours" FROM table_23113 WHERE "Owner" = 'David Langdon'
SELECT "Colours" FROM "table_23113" WHERE "Owner" = 'David Langdon'