About: http://webisa.webdatacommons.org/369108825

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	Letters of agreement to participate: As appropriate, there are two types of letters that may be included in the Supplementary Documents section of the proposal.
http://www.w3.org/ns/prov#wasQuotedFrom	nsf.gov