add sunset example.

app.py

@@ -139,6 +139,7 @@ examples = [
     ["house.png", "How could someone get out of the house?"],
     ["flower.jpg", "Question: What is this flower and where is it's origin? Answer:"],
     ["pizza.jpg", "What are steps to cook it?"],
+    ["sunset.jpg", "Here is a romantic message going along the photo:"],
     ["forbidden_city.webp", "In what dynasties was this place built?"],
 ]