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An approximately 2 - kilobase B2 transcript was expressed in all alfalfa organs tested .
 GENE: 2 - kilobase B2 transcript
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: 2 - kilobase B2 transcript