check if lemmas exist in snippet

src/components/Article.vue

@@ -157,7 +157,10 @@ export default {
               }
               else if (subitem.text) new_string += subitem.text
               else  {
+                if (definition.elements[0].items[linkIndex].lemmas) {
                 new_string +=  definition.elements[0].items[linkIndex].lemmas[0].lemma
+                }
+                
 
               }