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The Delta 1000 series ( also referred to as Straight-Eight ) was an American expendable launch system which was used to conduct eight orbit al launches between 1972 and 1975 .
 location: American
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: American 
Answer:
 location: American