user: What is enriched air and why would divers dive with enriched air?

assistant: Enriched air, also known as nitrox, is one kind of air with more than 21% oxygen. 21% oxygen is the normal air we breathe on the earth. The primary benefit of using enriched air is to extend the diver's bottom time, and reduce the need to push to no decompression limit. This advantage is really beneficial in deeper diving. 
For example, at 80 feet of depth, normal air can last around 30 min, while enriched air of 32% oxygen can last for 45 min and 36% can last for 55 min. 
While enriched air is really beneficial in extending bottom time, it is important that divers get trained to use it before diving with enriched air.

user: From this paragraph please summarize the notable California regions where pinot noir is produced.

assistant: Notable California regions that produce pinot noir include Sonoma County (Russian River Valley and Sonoma Coast), Mendocino County (Anderson Valley), Central Coast (Santa Lucia Highlands), and Santa Barbara County (Santa Maria Valley, Sta. Rita Hills American Viticulture Area).

user: What is a pineapple?

assistant: The pineapple is a fruit. It is native to South America, Central America and the Caribbean. The word "pineapple" came from European explorers, who thought the fruit looked similar to a pine cone. The pineapple is also a tropical plant and it must not be kept under 10 degrees. It takes a long time for the pineapple to grow. It mainly depends on the location and the growing conditions it gets. If the temperature is warm, the pineapple will grow faster. On average, it takes about two to three years to grow. If the fruit travels by boat, the fruit must be picked before ripening, since the trip takes a long time. Sometimes, pineapple has to travel by boat to be accessible to all. It is different for air travel. The pineapple can be picked when it is grown, since travel time is short. In most countries, they call the pineapple ananas.