9915
Gab2 , a new pleckstrin homology domain - containing adapter protein , acts to uncouple signaling from ERK kinase to Elk - 1 .
 GENE: Gab2; GENE: pleckstrin; GENE: ERK kinase; GENE: Elk - 1
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: Gab2, pleckstrin, ERK kinase, Elk - 1 
Answer:
 GENE: Gab2; GENE: pleckstrin; GENE: ERK kinase; GENE: Elk - 1