https://coney.cefriel.com/lod/Block_626734392-1569918565818_875 an entity of type: Question sur:hasText Have you ever done night sky brightness measurement before (e.g. with other photometers)? rdf:type sur:Question sur:SurveyElement sur:hasLatentVariable <https://coney.cefriel.com/lod/LatentVariable_1385652420> sur:hasObservableVariable <https://coney.cefriel.com/lod/ObservableVariable_1088194682> sur:inSurveyProcedure <https://coney.cefriel.com/lod/SurveyProcedure_626734392-1569918565818> sur:leadsTo <https://coney.cefriel.com/lod/Block_626734392-1569918565818_497> <https://coney.cefriel.com/lod/Block_626734392-1569918565818_714> <https://coney.cefriel.com/lod/Block_626734392-1569918565818_865> <https://coney.cefriel.com/lod/Block_626734392-1569918565818_866> <https://coney.cefriel.com/lod/Block_626734392-1569918565818_877> data from the linked data cloud