Detailed Instructions: Generate a correct and concise answer for the question based on the words in the context.
Problem:Context : The GWR 4073 Class 5043 Earl of Mount Edgcumbe is a steam locomotive of the GWR 'Castle' Class, built in March 1936.
Question : What year was the service entry date for GWR 4073 Class 5043 Earl of Mount Edgcumbe?
Solution:
March 1936