<http://schema.org/description>
"Researchers in Israel report a daytime nap may help memory -- especially for those learning more than one skill in one day."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Health_News/2008/01/08/Daytime_nap_may_help_memory_learning/UPI-96301199824045/>