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We exposed replicated phytoplankton communities confined in semi - permeable membrane - based mesocosms to 0 , 0 . 1 , 1 and 10 mu g L ( - 1 ) triclosan ( TCS ) and placed them back in their original environment to investigate the occurrence of trans - generational responses at individual , population and community levels .
 Chemical: triclosan; Chemical: TCS
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: triclosan; Chemical: TCS