15685
Following the opening of the Romney , Hythe and Dymchurch Railway in 1927 , the extra holiday traffic generated persuaded the Southern Railway ( who had taken over the line upon the railway grouping ) to realign its branch to New Romney by moving it nearer to the sea and opening two new halts - Lydd-on-Sea and Greatstone-on-Sea - in 1937 .
 Railway, Southern Railway
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Railway, Southern Railway