84430
The support coach and crew are an essential part of the long distance operation of preserved steam locomotive s in the United Kingdom on the main line network , as opposed to their use on heritage railway s. Since main line steam operation ended in 1968 , the static infrastructure and paid staff required to support steam locomotive operation no longer exists , requiring the use of support coaches and crews to travel with the locomotive .
 location: United Kingdom
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: United Kingdom 
Answer:
 location: United Kingdom