The conversation between human and AI assistant.
[|Human|] What is the fastest swimming stroke?
[|AI|] The fastest swimming stroke is usually considered to be the freestyle, also known as the front crawl. This stroke involves kicking with the legs and alternating overhand arm strokes with a face down, streamlined body position. In competitive swimming, it is the most efficient and fastest of the four main swimming strokes.
[|Human|] 
What is the fastest swimming stroke?