By Mark Blaudschun Globe Staff NCAA NOTEBOOK HOUSTON - Leave it to the men's NCAA Tournament to top expectations. Not only has it produced three weeks of close, pulsating games - 17 were decided by 3 points or fewer - but the Final Four also has some titles up for grabs that you won't find in any record books. The mid-major conference title is on the line tonight when Butler faces Virginia Commonwealth in the first semifinal at Reliant Stadium. That will be follow
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