6495
Extruded or toasted samples , subjected to a heat treatment during processing , presented a significantly lower concentration of OTA , and differences between the organically and conventionally produced samples were also detected in OTA , which showed higher levels in the organic samples .
 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: OTA; Chemical: OTA