Please answer the following question: NER Class L -  The NER Class L (LNER Class J73) was a class of 0-6-0T steam locomotives of the North Eastern Railway. They were a specialised design intended for use on the Redheugh and Quayside banks on either side of the River Tyne. They were replaced on the Quayside branch by NER Class ES1 electric locomotives in 1905 but were re-allocated to other duties. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Mean Of Transportation