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While the RAM is sold by AMD , it was manufactured by DDR4 SDRAM and VisionTek .
 organization: AMD; organization: VisionTek
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: AMD, VisionTek 
Answer:
 organization: AMD; organization: VisionTek