11643
More importantly , this fusion converted a less effective vaccine into one with significant potency against established E7 - expressing metastatic tumors .
 GENE: E7
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: E7 
Answer:
 GENE: E7