14904
In this study , four common aqueous based anti - malaria herbal products ( coded HEB , KFE , MDM and NIB ) which are used by Ghanaian population from pharmacy / herbal stores in the Madina area , Accra were blindly and randomly sampled for cadmium ( Cd ) , arsenic ( As ) and Lead ( Pb ) analysis using Atomic Absorption Spectrophotometry technique .
 Chemical: cadmium; Chemical: Cd; Chemical: arsenic; Chemical: As; Chemical: Pb
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: cadmium; Chemical: Cd; Chemical: arsenic; Chemical: As; Chemical: Pb