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Hetherington returned to the British Army during the First World War when he was appointed temporary Inspector of Works in the Staff of the Royal Engineers with the honorary rank of Lieutenant on 14 April 1915 .
 person: Hetherington; organization: British Army; organization: Royal Engineers
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: Hetherington; organization: British Army; organization: Royal Engineers