4588
There are two immunogenic sites on the type A influenza A / Japan / 57 ( H2N2 ) hemagglutinin ( HA ) that can be recognized by class I major histocompatibility complex ( MHC ) , H - 2Kd - restricted cytolytic T lymphocytes ( CTLs ) .
 GENE: hemagglutinin; GENE: HA; GENE: class I major histocompatibility complex; GENE: MHC; GENE: H - 2Kd
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: hemagglutinin, HA, class I major histocompatibility complex, MHC, H - 2Kd 
Answer:
 GENE: hemagglutinin; GENE: HA; GENE: class I major histocompatibility complex; GENE: MHC; GENE: H - 2Kd