23875
To investigate the possible inhibitory effects of beta - ionone , we studied cell growth characteristics , DNA synthesis , cell cycle progression , as well as mitogen - activated protein kinases ( MAPKs ) pathways in the human gastric adenocarcinoma cancer cell line ( SGC - 7901 ) .
 Chemical: beta - ionone
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: beta - ionone 
Answer:
 Chemical: beta - ionone