About: http://webisa.webdatacommons.org/357777995

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	However, first, there is a problem that the planar optical circuit and the semiconductor optical device are required to be fabricated separately and joined to each other in alignment, which is not easy.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com