history: Surfing is the best.  I surfing everyday!
knowledge: 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.
response: Oh, cool! So you ride the waves, huh?
history: Surfing is the best.  I surfing everyday!
Oh, cool! So you ride the waves, huh?
I do! What do you know about windsurfing?
knowledge: Windsurfing is a surface water sport that combines elements of surfing and sailing.
response: Windsurfing which is done on the  surface water combines elements of surfing and sailing.
history: Surfing is the best.  I surfing everyday!
Oh, cool! So you ride the waves, huh?
I do! What do you know about windsurfing?
Windsurfing which is done on the  surface water combines elements of surfing and sailing.
I think it seems too difficult for me.
knowledge: 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.
response: I see. Do you surf with or without a surfboard?
history: Surfing is the best.  I surfing everyday!
Oh, cool! So you ride the waves, huh?
I do! What do you know about windsurfing?
Windsurfing which is done on the  surface water combines elements of surfing and sailing.
I think it seems too difficult for me.
I see. Do you surf with or without a surfboard?
With, I wonder how someone surfs without a board.
knowledge: Skimboarding (or skimming) is a boardsport in which a ''skimboard'' (much like a surfboard but smaller and without fins) is used to glide across the water's surface to meet an incoming breaking wave, and ride it back to shore.
response: I don't know, but there's something called skimboarding, which involves surfing on a small board without fins.