Translate the following English sentence to French:
"On 14 December 1999, a five year-old boy called Clément was found in a sleeping-car on the Calais-Ventimiglia train, crying for his mother who was taking him to visit his sick grandmother."
Le 14 décembre dernier, dans les wagons-lits du train Calais-Vintimille, le petit Clément, 5 ans, pleure en demandant sa maman qui l'accompagne pour rendre visite à la grand-mère malade.