Solar cells

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SELECT distinct  ?label_en ?page
WHERE 
 {
 ?subject dcterms:subject <http://dbpedia.org/resource/Category:Solar_cells>.
 FILTER (REGEX(?subject, '[^a-z A-Z 0-9]*')) . 
<http://dbpedia.org/resource/Category:Solar_cells>  rdfs:label ?label  . 
         FILTER (LANG(?label) = 'en') .
         ?subject rdfs:label ?label_en .
         FILTER (LANG(?label_en) = 'en' || LANG(?label_en) = 'it' ) .
           
OPTIONAL {
        ?subject  foaf:isPrimaryTopicOf  ?page .
 }} limit 1000

|yes |WIKITABLE |{{{x}}} |{{{y}}} }}

Solar cells

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