4893
Comparing all results obtained it can be observed that the minimum dose of Cu that is capable of significantly altering chlorophyll a ( chl a ) fluorescence intensity were 1 x 10 ( - 7 ) M in Chroococcus sp .
 Chemical: Cu; Chemical: chlorophyll a; Chemical: chl a
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Cu, chlorophyll a, chl a 
Answer:
 Chemical: Cu; Chemical: chlorophyll a; Chemical: chl a