Simplify the following text for a Grade 7 native English-speaking person.
Original: A tram line runs the length of the coast , from De Panne on the French border , via the port of Ostend ( Oostende ) , to Knokke-Heist on the Dutch frontier .
Simplified: A tram line runs the length of the coast , from De Panne on the French border to Knokke-Heist on the Dutch frontier .