<http://schema.org/contactOption>
"TollFree"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.clearancejobs.com/jobs/?RC=25&Ns=p_TimeStamp%7C1&N=6009+6021+6047+6049+4294966916+4052+4294965420&No=0>