Complex sentence: The Merrimack Valley Conference (or MVC) is a high school sports league located in the Commonwealth of Massachusetts and is named after the Merrimack River Valley where all of the primary league schools are located.
Split into simpler sentences: The Merrimack Valley Conference (or MVC) is a high school sports league located in the Commonwealth of Massachusetts. It is named after the Merrimack River Valley where all of the primary league schools are located.