<http://schema.org/caption>
"Book covers: Students will need book covers to cover their text books. You can use paper bags, or you can also get fancy by buying decorative and easy-to-use book covers."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.wpbf.com/article/non-required-items-your-kids-need-for-school/1157287>