12163
Furthermore , hormonal regulation of G ( 1 ) gene transcription can occur even without additional activation of the Mek - Erk1 / 2 pathway by estrogen receptors .
 GENE: Mek; GENE: Erk1 / 2; GENE: estrogen receptors
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: Mek, Erk1 / 2, estrogen receptors 
Answer:
 GENE: Mek; GENE: Erk1 / 2; GENE: estrogen receptors