4564
Alleviation effects of magnesium on copper toxicity and accumulation in grapevine roots evaluated with biotic ligand models .
 Chemical: magnesium; Chemical: copper
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: magnesium; Chemical: copper