CREATE TABLE table_3790 ("Year" TEXT, "Stage" FLOAT, "Start of stage" TEXT, "Distance  ( km ) " TEXT, "Category of climb" TEXT, "Stage winner" TEXT, "Nationality" TEXT, "Yellow jersey" TEXT, "Bend" FLOAT)

How many bends occur when the yellow jersey is Lance Armstrong and stage winner is Lance Armstrong?
SELECT COUNT("Bend") FROM table_3790 WHERE "Yellow jersey" = 'Lance Armstrong' AND "Stage winner" = 'Lance Armstrong'
SELECT COUNT("Bend") FROM "table_3790" WHERE "Stage winner" = 'Lance Armstrong' AND "Yellow jersey" = 'Lance Armstrong'