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Variable used when already in-scope: ?v1 in ((AGG ?.0 count(?y0)) AS ?v1)
com.hp.hpl.jena.query.QueryParseException: Variable used when already in-scope: ?v1 in ((AGG ?.0 count(?y0)) AS ?v1)	at com.hp.hpl.jena.sparql.lang.SyntaxVarScope.checkAssignment(SyntaxVarScope.java:189)	at com.hp.hpl.jena.sparql.lang.SyntaxVarScope.checkExprListAssignment(SyntaxVarScope.java:141)	at com.hp.hpl.jena.sparql.lang.SyntaxVarScope.checkQueryScope(SyntaxVarScope.java:92)	at com.hp.hpl.jena.sparql.lang.SyntaxVarScope.check(SyntaxVarScope.java:66)	at com.hp.hpl.jena.sparql.lang.SPARQLParser.validateParsedQuery(SPARQLParser.java:56)	at com.hp.hpl.jena.sparql.lang.ParserSPARQL11.parse$(ParserSPARQL11.java:54)	at com.hp.hpl.jena.sparql.lang.SPARQLParser.parse(SPARQLParser.java:37)	at com.hp.hpl.jena.query.QueryFactory.parse(QueryFactory.java:139)	at com.hp.hpl.jena.query.QueryFactory.create(QueryFactory.java:79)	at com.hp.hpl.jena.query.QueryFactory.create(QueryFactory.java:52)	at com.hp.hpl.jena.query.QueryFactory.create(QueryFactory.java:40)	at com.hp.hpl.jena.query.QueryExecutionFactory.makeQuery(QueryExecutionFactory.java:565)	at com.hp.hpl.jena.query.QueryExecutionFactory.create(QueryExecutionFactory.java:192)	at org.aksw.autosparql.tbsl.gui.vaadin.TBSLManager.executeSelect(TBSLManager.java:959)	at org.aksw.autosparql.tbsl.gui.vaadin.TBSLManager.fetchResult(TBSLManager.java:415)	at org.aksw.autosparql.tbsl.gui.vaadin.TBSLManager.createAnswer(TBSLManager.java:384)	at org.aksw.autosparql.tbsl.gui.vaadin.TBSLManager.answerQuestion(TBSLManager.java:345)	at org.aksw.autosparql.tbsl.gui.vaadin.view.MainView$11.run(MainView.java:504)	at java.lang.Thread.run(Thread.java:744)