3343
Both the P73 and P74 sites have been treated regularly with ( undisclosed ) pesticides , as permitted under EU regulations , though other ( e . g . industrial ) organic residues may also be present .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None