13460
The objective of the present study was to evaluate the role of silver and vanadium release in the acute toxicity of this material using Daphnia similis .
 Chemical: silver; Chemical: vanadium
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: silver; Chemical: vanadium