5048
Consequently , when Se is used to alleviate Cd toxicity , attention must be paid to the Cd pollution extent and doses of Se supplement .
 Chemical: Se; Chemical: Cd; Chemical: Cd; Chemical: Se
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: Se; Chemical: Cd; Chemical: Cd; Chemical: Se