23103
In the measurement of photosynthetic pigments , the decrease in chlorophyll a content was detected at 5 and 50 mu g / L , whereas the increase in carotenoids / total chlorophyll was observed from 0 . 05 mu g / L .
 Chemical: chlorophyll a; Chemical: chlorophyll
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 a; Chemical: chlorophyll