26953
A biochemically heterogeneous group of compounds , calcium channel blockers , have been shown in vitro to attenuate MeHg ' s toxicity .
 Chemical: calcium; Chemical: MeHg
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: calcium; Chemical: MeHg