Fix if no ap is set

src/SQL2Linked/Implementations/ResourceStructuralData.cs

@@ -92,6 +92,12 @@ namespace SQL2Linked.Implementations
                 AssertToGraphLiteralNode(graph, resourceGraphName, dcterms + "description", entry.Description);
                 Console.WriteLine($"For resource '{entry.DisplayName}' will migrate triple '{resourceGraphName} {dcterms}description {entry.Description}'. ");
 
+                // Skipping broken resources
+                if (string.IsNullOrWhiteSpace(entry.ApplicationProfile))
+                {
+                    continue;
+                }
+
                 AssertToGraphUriNode(graph, resourceGraphName, dcterms + "conformsTo", entry.ApplicationProfile);
                 Console.WriteLine($"For resource '{entry.DisplayName}' will migrate triple '{resourceGraphName} {dcterms}conformsTo {entry.ApplicationProfile}'. ");