<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
What do you think UFO sightings are?
<|assistant|>
UFO sightings are often thought to be extraterrestrial spacecrafts seen flying near the Earth's atmosphere. Some UFO sightings may in fact be explained as natural phenomena, weather balloons, or mistaken identity. However, many people believe that some UFOs are indeed of unexplained origin.