Hi, do you enjoy watching the NBA?
I do like to watch the National Basketball Association's games sometimes.
I see, do you when it was founded?
It was founded on June 6, 1946.
That is quite along time ago. I wonder how many teams play in the NBA
Currently 30 teams play for the NBA, one of which is a Canadian team
A Canadian team?! I thought it was only for teams in the US. 
Me too. But it was founded by owners of major ice hockey arenas in the Northwestern and Midwestern US and Canada, which might explain why there is a Canadian team.