128558
Its number was changed to just " 9 " on 12 January 1946 , under the renumbering scheme of Nigel Gresley 's successor , Edward Thompson .
 person: Nigel Gresley; person: Edward Thompson
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Nigel Gresley, Edward Thompson 
Answer:
 person: Nigel Gresley; person: Edward Thompson