Complex sentence: Liberty North High School (LNHS) is a four-year high school located in Liberty, Missouri, with an enrollment of over 1,600, which rapidly increased with the addition of the freshman class for the first time during the 2013--14 school year.
Split into simpler sentences: Liberty North High School (LNHS) is a four-year high school located in Liberty, Missouri. Its current enrollment is over 1,600 which rapidly increased with the addition of the freshman class for the first time during the 2013--14 school year.