About: http://webisa.webdatacommons.org/94994120

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 problem is that there are at least 20 kinds of drought indices - numerical scales based on data such as rainfall and temperature - used to measure three types of droughts: meteorological, agricultural and hydrological.
http://www.w3.org/ns/prov#wasQuotedFrom	semide.net