add example

app.py

@@ -99,7 +99,8 @@ gr.Interface(
     description="Input a question with its long-form answer to see the predicted discourse structure by our role classifier.",
     article=article,
     examples=[
-        #['', '']
+        ['''If a sheep's wool never stops growing, how are they not extinct?''',
+         '''It's already answered that continuous wool growth has been selected by human breeders, but there's a misconception in your question that I'd like to address.Evolution doesn't select for what is best for *the individual*.Traits that help the individual don't necessarily survive.Only traits that ensure *procreation* survive.The quality of life is no concern to nature.Think of pain.There's absolutely no sense of us feeling excruciating pain.When you're dying, its about as much help to you as a sheep with meter long hair.Pain itself however is very useful during lifetime to avoid injury.An individual capable of feeling pain is much more likely to procreate than an individual which is not.That said, it is very unlikely for an expensive trait like growing massive amounts of wool to occur in wild sheep.However, given the right circumstances, it could well occur.Provided it doesn't hamper reproduction too much.''']
     ]
 ).launch(enable_queue=True)