Simplify the following text for a Grade 4 native English-speaking person.
Original: Nielles-l Ã s-Bl Ã quin lies about 12 miles ( 19 km ) southwest of Saint-Omer , at the junction of the D191 and D202 roads , on the banks of the small river BlÃ quin .
Simplified: Nielles-l Ã s-Bl Ã quin is a commune .