Complex sentence: The rolling stock of the Diakofto-Kalavrita railway consists of three diesel-electric trainsets ("Class 3001 ") built by Billard in 1958 and three more ("Class 3004") built by Decauville in 1967.
Split into simpler sentences: The rolling stock of the Diakofto-Kalavrita railway consists of three diesel-electric trainsets ("Class 3001 ") built by Billard in 1958. Three similar trainsets ("Class 3004") built by Decauville were added in 1967.