added temporal coverage generation from about section

dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/ADS/ordered_sparql_insert_321.sparql

@@ -80,6 +80,21 @@ WHERE {
     }
 };
 
+PREFIX aocat: <https://www.ariadne-infrastructure.eu/resource/ao/cat/1.1/>
+PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
+
+INSERT {
+    GRAPH <https://ariadne-infrastructure.eu/api_________::ariadne_plus::ads::321> {
+        ?s aocat:has_temporal_coverage ?t .
+    }
+}
+USING <https://ariadne-infrastructure.eu/api_________::ariadne_plus::ads::321>
+WHERE {
+ ?s aocat:is_about ?about .
+  ?about aocat:has_time_interval ?t .
+  ?t rdf:type aocat:AO_Temporal_Region .
+};
+
 PREFIX aocat: <https://www.ariadne-infrastructure.eu/resource/ao/cat/1.1/>
 PREFIX skos: <http://www.w3.org/2004/02/skos/core#>