Task: Question Answering
Input (English): passage: Throughout the years, the Cowboys' blue jersey has been popularly viewed to be ``jinxed'' because the team often seemed to lose when they wore them. This purported curse drew attention after the team lost Super Bowl V with the blue jerseys. However, the roots of the curse likely date back earlier to the 1968 divisional playoffs, when the blue-shirted Cowboys were upset by the Cleveland Browns in what turned out to be Don Meredith's final game with the Cowboys. Dallas's lone victory in a conference championship or Super Bowl wearing the blue jerseys was in the 1978 NFC Championship game against the Los Angeles Rams.
 question: have the dallas cowboys ever lost a super bowl?
Output (English): Yes