Simplify the following text for a Grade 7 native English-speaking person.
Original: Saint-Cierge-la-Serre is a commune in the ArdÃ che department in the RhÃ ne Valley in southern France .
Simplified: Saint-Cierge-la-Serre is a commune in the ArdÃ che dÃ partement in the RhÃ ne Valley in southern France .