18733
Relative water content ( RWC ) and chlorophyll ( chl ) content were decreased by As treatment but proline ( Pro ) content was increased .
 Chemical: chlorophyll; Chemical: chl; Chemical: As; Chemical: proline; Chemical: Pro
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: chlorophyll; Chemical: chl; Chemical: As; Chemical: proline; Chemical: Pro