How many seasons did Kevin Mchale star in the NBA for the Boston Celtics?"

Kevin Edward McHale (born December 19, 1957) is a retired <a rel="nofollow" href="http://en.wikipedia.org/wiki/United_States" title="United States" style="text-decoration: none; color: rgb(0, 43, 184); background-image: none; background-repeat: initial; background-attachment: initial; -webkit-background-clip: initial; -webkit-background-origin: initial; background-color: initial; background-position: initial initial; ">American</a> professional <a rel="nofollow" href="http://en.wikipedia.org/wiki/Basketball" title="Basketball" style="text-decoration: none; color: rgb(0, 43, 184); background-image: none; background-repeat: initial; background-attachment: initial; -webkit-background-clip: initial; -webkit-background-origin: initial; background-color: initial; background-position: initial initial; ">basketball</a> player who starred for thirteen seasons in the<a rel="nofollow" href="http://en.wikipedia.org/wiki/NBA" title="NBA" class="mw-redirect" style="text-decoration: none; color: ...  more