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Region - specific enhancers near two mammalian homeo box genes define adjacent rostrocaudal domains in the central nervous system .
 GENE: mammalian homeo box genes
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: mammalian homeo box genes