2363
This is consistent with the need for a nuclear retinoid receptor function in RA - induced ERK2 activation .
 GENE: retinoid receptor; GENE: ERK2
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: retinoid receptor; GENE: ERK2