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Ochratoxin A ( OTA ) , one of the most abundant mycotoxin food contaminants , is classified as " possibly carcinogenic to humans . " Our previous study showed that OTA could induce a G2 arrest in immortalized human gastric epithelium cells ( GES - 1 ) .
 Chemical: Ochratoxin A; Chemical: OTA; Chemical: OTA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Ochratoxin A; Chemical: OTA; Chemical: OTA