About: http://webisa.webdatacommons.org/405779159

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The risk-free interest rate that we use is based on the United States Treasury yield in effect at the time of grant for zero coupon
http://www.w3.org/ns/prov#wasQuotedFrom	sec.gov