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http://lod.onb.ac.at/sparql/akon
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### postcards from 1921
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```
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PREFIX dc: <http://purl.org/dc/elements/1.1/>
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SELECT ?dc_title
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WHERE {?subjectURI dc:title ?dc_title.
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?subjectURI dc:date "1921"}
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```
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### distinct postcards from 1921
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```
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PREFIX dc: <http://purl.org/dc/elements/1.1/>
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SELECT DISTINCT ?dc_title
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WHERE {?subjectURI dc:title ?dc_title.
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?subjectURI dc:date "1921"}
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```
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#### number of titles
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```
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