About: http://webisa.webdatacommons.org/79130596

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	A light emitting diode (LED) is mounted behind each hole so that there is a visual indication of the block's operation.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com