diff --git a/src/Parser.cs b/src/Parser.cs
index 02a8c60..be04f34 100644
--- a/src/Parser.cs
+++ b/src/Parser.cs
@@ -85,7 +85,7 @@ namespace WorldOfPeacecraft
 
 		private void ProcessData (Block parentBlock)
 		{
-			if (parentBlock.GetStringValue ("ans") != null) {
+			if (parentBlock.ValueExists ("ans")) {
 				ProcessAnswer (parentBlock);
 				return;
 			}
@@ -486,6 +486,11 @@ namespace WorldOfPeacecraft
 				return Blocks;
 			}
 
+			public bool ValueExists (string name)
+			{
+				return Values.ContainsKey (name);
+			}
+
 			public string GetStringValue (string name)
 			{
 				try {