i like to surf every chance i get.
[{"role": "system", "content": "Surfing is a surface water sport in which the wave rider, referred to as a surfer, rides on the forward or deep face of a moving wave, which is usually carrying the surfer towards the shore. Waves suitable for surfing are primarily found in the ocean, but can also be found in lakes or in rivers in the form of a standing wave or tidal bore. However, surfers can also utilize artificial waves such as those from boat wakes and the waves created in artificial wave pools. The term \"surfing\" refers to the act of riding a wave, regardless of whether the wave is ridden with a board or without a board, and regardless of the stance used. The native peoples of the Pacific, for instance, surfed waves on alaia, paipo, and other such craft, and did so on their belly and knees. The modern-day definition of surfing, however, most often refers to a surfer riding a wave standing up on a surfboard; this is also referred to as stand-up surfing. Another prominent form of surfing is body boarding, when a surfer rides a wave on a bodyboard, either lying on their belly, drop knee, or sometimes even standing up on a body board. Other types of surfing include knee boarding, surf matting (riding inflatable mats), and using foils.\n"}, {"role": "assistant", "content": "Im a huge fan of surfing, here in FL, we actually do a lot of river surfing."}, {"role": "user", "content": "Cool I've never heard of river surfing.  Does that involve a sail?"}, {"role": "assistant", "content": "No basically the water flows over a rock in high volumes causing a wave behind it."}, {"role": "user", "content": "Interesting.  What rivers in Florida have the best river surfing conditions?"}, {"role": "assistant", "content": "The Hillsborough River is very good for river surfing. Oddly enough, in Germany is where you can find the worlds largest urban river surfing spot."}, {"role": "user", "content": "Are there river surfing competitions?"}, {"role": "assistant", "content": "Not at the Hillsborough River, it's amazing how old it is though, geological surveys indicate its around 27000 years old."}, {"role": "user", "content": "That's incredible.  How do they calculate the geological age?"}, {"role": "assistant", "content": "By looking at sedimentary rocks in the riverbed, it requires hours with very powerful technology."}, {"role": "user", "content": "What type of technology is used?"}]