300
In the studies described in this report , we have identified two potential Ets binding sites , EBS1 and EBS2 , which are conserved in both the human and murine interleukin - 2 enhancers .
 GENE: Ets; GENE: EBS1; GENE: EBS2; GENE: interleukin - 2
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: Ets; GENE: EBS1; GENE: EBS2; GENE: interleukin - 2