Please answer this: Determine the topic of the question. Question: "how is a backpack made?" Topic:
++++++++
Answer: Backpack

Please answer this: Determine the topic of the question. Question: "what countries are in cono sur?" Topic:
++++++++
Answer: Southern Cone

Please answer this: Determine the topic of the question. Question: "what is Polyester in packaging PET?" Topic:
++++++++
Answer:
Polyethylene terephthalate