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However , being traded over the counter ( OTC ) , forward contracts specification can be customized and may include mark-to-market and daily margin calls .
 organization: OTC
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: OTC 
Answer:
 organization: OTC