<http://schema.org/description>
"Studies show that the average person knows about 611 other people, 300 of which make it to the status of Facebook friend. Interestingly, however, according to analysis done by the Pew Research"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.aol.com/article/2013/12/02/personal-networks-cores-edges-and-what-they-mean-f/20780200/>