About: http://webisa.webdatacommons.org/119212903

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	As became clear yesterday, however, beamed laser propulsion also carries its share of problems, including the fact that we need to beam the laser photons over large distances.
http://www.w3.org/ns/prov#wasQuotedFrom	centauri-dreams.org