1125
Members of the myocyte - specific enhancer - binding factor 2 ( MEF2 ) family of transcription factors bind a conserved A / T - rich sequence in the control regions of numerous muscle - specific genes .
 GENE: myocyte - specific enhancer - binding factor 2; GENE: MEF2
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: myocyte - specific enhancer - binding factor 2, MEF2 
Answer:
 GENE: myocyte - specific enhancer - binding factor 2; GENE: MEF2