Simplify the following text for a Grade 4 native English-speaking person.
Original: Moline is a city located in Rock Island County , Illinois , United States , with a population of 43,483 in 2010 . Moline is one of the Quad Cities , along with neighboring East Moline and Rock Island in Illinois and the cities of Davenport and Bettendorf in Iowa .
Simplified: Moline is a city of Illinois in the United States .