BirgitPohl

<quiz>
    <film id="Mercury"
        onCorrect="Very nice!
        Here is more information: http://solarsystem.nasa.gov/planets/mercury"
        onWrong="It is Mercury.
        Here is more information: http://solarsystem.nasa.gov/planets/mercury">
        <label>
            <text>What is this celestial object?</text>
        </label>
        <label>