<http://schema.org/description>
"How do I figure out which bulb is burned out on four-wire icicle-type outdoor Christmas lighting? Twenty-five percent of one string is not working. Is there a simple way to determine which bulb needs to be replaced?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://home.howstuffworks.com/home-decor/seasonal/question270.htm>