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He left school at 14 , and at about that time won an art competition in a national newspaper with a watercolour drawing of an aircraft ; on the strength of this he obtained his first job in an advertising studios in the Strand .
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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:
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