diff --git a/prepare/src/main/guessNNprepare/mains/ComputeConcepts.scala b/prepare/src/main/guessNNprepare/mains/ComputeConcepts.scala
index 42215a9..5034e1d 100644
--- a/prepare/src/main/guessNNprepare/mains/ComputeConcepts.scala
+++ b/prepare/src/main/guessNNprepare/mains/ComputeConcepts.scala
@@ -9,6 +9,7 @@ import org.apache.jena.sparql.core.Var
 import org.apache.jena.sparql.engine.binding.BindingFactory
 import org.json.{JSONArray, JSONObject, JSONTokener}
 
+import java.io.PrintWriter
 import java.nio.file.{Files, Path, Paths}
 import java.util.concurrent.atomic.AtomicBoolean
 import scala.jdk.CollectionConverters.SeqHasAsJava
@@ -97,10 +98,10 @@ object ComputeConcepts extends MainCommand {
 	private def processConcept(concept: JSONObject): JSONObject = {
 		val result = new JSONObject()
 		result.put("extensionalDistance", concept.getInt("extensionalDistance"))
-		val objects: Seq[JSONObject] = Utils.JSONArrayElementsAs(concept.getJSONArray("answers"))
+		val objects: Seq[String] = Utils.JSONArrayElementsAs[JSONArray](concept.getJSONArray("answers"))
+			.map(answerRow => answerRow.getString(0))
 		result.put("properSize", objects.size)
 		result.put("elements", new JSONArray(objects.asJava))
-
 		result
 	}
 }