<http://schema.org/about>
"Having electric light available at all times during the night is one of those luxuries we have taken for granted in our modern age -- but the results of a new study suggest that a well-lit house at night might actually be making you"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/green-food/having-lights-on-at-night-may-be-making-you-fatter.html>