Update app.py

Updating comments.

app.py

@@ -77,7 +77,9 @@ def generate_response(question: str) -> list[str, str, str]:
 with gr.Blocks() as demo:
     gr.Markdown("""
         # Retrieval (ColBERT) + Generation (DSPy & Mistral)
-        - Note: building the retrieval model might take a few minutes.
+        - Note:
+            - building the retrieval model will be slow on **free CPU** (expect 5+ minutes).
+            - first question/answer will be slow (2 minutes for model loading). Subsequent question (approx. 10 seconds)
         - Usage: upload a few PDF files to index. Build the model. Ask questions.
     """)
 
@@ -95,7 +97,7 @@ with gr.Blocks() as demo:
     # Question to answer
     question = gr.Textbox(
         label="Question",
-        placeholder="How do tax administrations address aggressive tax planning by HNWIs?"
+        placeholder="What is dividend stripping?"
     )
     response = gr.Textbox(
         label="Response",