query = "select ?a AS ?count where {?a <a> ?b.} limit 10";
    VirtGraph set = new VirtGraph (url, "user", "pass");
    Query sparql = QueryFactory.create(query);
    VirtuosoQueryExecution vqe = VirtuosoQueryExecutionFactory.create(sparql, set);
    vqe.execSelect();

com.hp.hpl.jena.query.QueryParseException:
    Lexical error at line 1, column 13.  Encountered: " " (32), after : "AS"
    at com.hp.hpl.jena.sparql.lang.ParserSPARQL.perform(ParserSPARQL.java:99)