Complex sentence: Well, there are no service during the weekends from Ronkonkoma to Greenport starting from Columbus Day and starting from Memorial Day to Columbus Day only weekend service is provided to Greenport due to MTA 2010 budget cuts.
Split into simpler sentences: Well, there are no service from Ronkonkoma to Greenport starting from Columbus Day. Starting from Memorial Day to Columbus Day only weekend service is provided to Greenport due to MTA 2010 budget cuts.