4796
Developed from one of George Jackson Churchward 's pioneer designs – the experimental No 99 – a number of derivative classes were built over the period from 1906 to 1950 .
 person: George Jackson Churchward
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: George Jackson Churchward