<|im_start|>user
What is the air speed velocity of an unladen swallow?<|im_end|>
<|im_start|>assistant
The European swallow, weighing on average 20 grams, flaps its wings 12 times every second, this results in an estimated air speed of 9 meters per second, which is roughly 20.1 miles per hour.<|im_end|>
