add gradio prompts (example input)

app.py

@@ -12,6 +12,12 @@ if __name__ == "__main__":
     inputs = "text", 
     outputs = ['text'],
     title = 'Sentiment Analysis', 
-    description = 'Get Sentiment Negative/positive for the given input'
+    description = 'Get Sentiment Negative/positive for the given input',
+    examples=[
+        ["This is better than nothing."],
+        ["This is better than a kick in the face. Guess you can't look a gift horse in the mouth."],
+        ["I'd rather have root canal than experience this again."],
+        ["They seem to have a bias as all the people working at the reception look exactly the same."],
+    ],
   )
   iface.launch(inline = False)