diff --git a/src/main/java/de/ids_mannheim/korap/query/serialize/Cosmas2QueryProcessor.java b/src/main/java/de/ids_mannheim/korap/query/serialize/Cosmas2QueryProcessor.java
index 41704fe..cc03439 100644
--- a/src/main/java/de/ids_mannheim/korap/query/serialize/Cosmas2QueryProcessor.java
+++ b/src/main/java/de/ids_mannheim/korap/query/serialize/Cosmas2QueryProcessor.java
@@ -24,6 +24,8 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.common.collect.HashBasedTable;
 import com.google.common.collect.Table;
 
@@ -140,11 +142,22 @@
         KoralObjectGenerator.setQueryProcessor(this);
         this.query = query;
         process(query);
-        if (DEBUG) { 
-            log.debug(">>> " + requestMap.get("query") + " <<<");
-        System.out.printf("Cosmas2QueryProcessor: >>%s<<.\n",  requestMap.get("query"));
-        }
-    }
+        if (verbose) 
+        	{ 
+            //log.debug(">>> " + requestMap.get("query") + " <<<");
+            try {
+	        	// query from requestMap is unformatted JSON. Make it pretty before displaying:
+	        	ObjectMapper mapper = new ObjectMapper();
+	        	String jsonQuery = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(requestMap.get("query"));
+				System.out.printf("Cosmas2QueryProcessor: JSON output: %s\n\n", jsonQuery);
+				} 
+	        catch (JsonProcessingException e) 
+	        	{
+	        	System.out.printf("Cosmas2QueryProcessor: >>%s<<.\n",  requestMap.get("query"));
+	            //e.printStackTraObjectMapper mapper = new ObjectMapper();ce();
+				}
+        	}
+    	}
 
 
     @Override
@@ -157,11 +170,10 @@
         }
         if (tree != null) 
         	{
-            
-                if (DEBUG) {
-            	log.debug("ANTLR parse tree: " + tree.toStringTree());
-                System.out.printf("\nANTLR parse tree: %s.\n\n",  tree.toStringTree());
-                }
+            if (verbose) {
+	        	log.debug("ANTLR parse tree: " + tree.toStringTree());
+	            System.out.printf("\nANTLR parse tree: %s.\n\n",  tree.toStringTree());
+	            }
 
             processNode(tree);
         	}
@@ -181,11 +193,13 @@
         stackedObjects = 0;
         stackedToWrap = 0;
 
-        if (verbose) {
+        /*
+         if (verbose) {
             System.err.println(" " + objectStack);
             System.out.println(openNodeCats);
         }
-
+        */
+        
         /* ***************************************
          * Processing individual node categories *
          * ***************************************
diff --git a/src/main/java/de/ids_mannheim/korap/query/serialize/QuerySerializer.java b/src/main/java/de/ids_mannheim/korap/query/serialize/QuerySerializer.java
index 94bf15d..ba98f24 100644
--- a/src/main/java/de/ids_mannheim/korap/query/serialize/QuerySerializer.java
+++ b/src/main/java/de/ids_mannheim/korap/query/serialize/QuerySerializer.java
@@ -18,6 +18,7 @@
 import de.ids_mannheim.korap.query.serialize.util.KoralObjectGenerator;
 import de.ids_mannheim.korap.query.serialize.util.StatusCodes;
 
+import com.fasterxml.jackson.core.JsonPointer;
 
 /**
  * Main class for Koral, serializes queries from concrete QLs to KoralQuery
@@ -33,7 +34,7 @@
     private String version = "Unknown";
     private String name = "Unknown";
     private static Properties info;
-
+    private boolean bDebug = false;
         {
           
             loadInfo();
@@ -104,24 +105,31 @@
         int i = 0;
         String[] queries = null;
         String ql = "poliqarpplus";
-        boolean bDebug = true;
+        boolean bDebug = false;
 
         if (args.length < 2) {
             System.err
-                    .println("Usage: QuerySerializer \"query\" queryLanguage");
+                    .println("Usage: QuerySerializer \"query\" queryLanguage [-show]");
             System.exit(1);
         }
         else {
             queries = new String[] { args[0] };
             ql = args[1];
         }
+        if( args.length >= 3 )
+	        {
+        	if( args[2].compareToIgnoreCase("-show") == 0 )
+	        	bDebug = true;	
+	        }
+        
         for (String q : queries) {
             i++;
             try {
-		if( bDebug ) System.out.printf("QuerySerialize: query = >>%s<< lang = %s.\n", q, ql);
-            	
-		jg.run(q, ql);
-                System.out.println();
+				if( bDebug ) 
+					System.out.printf("QuerySerialize: query = >>%s<< lang = %s.\n", q, ql);
+		            	
+				jg.run(q, ql, bDebug);
+		        	System.out.println();
             }
             catch (NullPointerException npe) {
                 npe.printStackTrace();
@@ -145,9 +153,9 @@
      *            'poliqarpplus', 'cqp', 'cosmas2', 'annis' or 'cql'.
      * @throws IOException
      */
-    public void run (String query, String queryLanguage) throws IOException {
+    public void run (String query, String queryLanguage, boolean bDebug) throws IOException {
 
-	ast.verbose = DEBUG ? true : false; // debugging: 01.09.23/FB
+    	ast.verbose = bDebug; // debugging: 01.09.23/FB
 
         if (queryLanguage.equalsIgnoreCase("poliqarp")) {
             ast = new PoliqarpPlusQueryProcessor(query);
@@ -174,7 +182,9 @@
             throw new IllegalArgumentException(
                     queryLanguage + " is not a supported query language!");
         }
-        System.out.println(this.toJSON());
+        
+        if( bDebug )
+        	System.out.println(this.toJSON());
     }
 
     public QuerySerializer setQuery (String query, String ql, String version) {
@@ -230,7 +240,7 @@
     public final String toJSON () {
         String ser;
         try {
-            ser = mapper.writeValueAsString(raw());
+        	ser = mapper.writeValueAsString(raw());
             // System.out.println(ser);
         }
         catch (JsonProcessingException e) {