updated prompt

app.py

@@ -130,7 +130,7 @@ def main():
 
             1. Obtain an [API Key](https://cloud.llamaindex.ai/api-key) from LlamaParse to parse your document. 
             2. Obtain a similar API Key from your preferred LLM provider.
-            3. Make selections at the left and upload a document to use a context.
+            3. Make selections at the left and upload a document to use as context.
             4. Begin asking questions below!
             """
         )
@@ -144,7 +144,9 @@ def main():
             value=prompt_txt
         )
 
-        if parsed_document is not None:
+        run = st.button("Answer", type="primary")
+
+        if parsed_document is not None and run:
             index = VectorStoreIndex.from_documents(parsed_document)
             query_engine = index.as_query_engine()
             response = query_engine.query(prompt)