The SportsNotebook’s historical tour goes to the Farmbelt for a look into a five-year stretch in the 1990s. If you live in the great state of Nebraska, your college football loyalties—for that matter, your entire life—undoubtedly reside the Cornhusker football team. And the best option for the NFL has traditionally been the Kansas City Chiefs. From 1993-97, Nebraska football won three national championships and came close twice more. And while the Chiefs couldn’t get over the top for the brass ring, they made sure football fans had plenty to do on Sunday, producing three outstanding teams in this timeframe, plus a fourth that made the playoffs. The Notebook looks back on what it was like to be in Nebraska from 1993-97…