<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Health_News/2013/05/13/Small-amounts-of-formula-may-prolong-breastfeeding-time/UPI-34441368481137/?spt=hs&or=hn>