About: http://webisa.webdatacommons.org/284207608

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	It helps to adjust the secondary mirror in a brightly lit room with the telescope pointed towards a bright surface, such as white paper or wall.
http://www.w3.org/ns/prov#wasQuotedFrom	telescope.com