17878
The quantum yield ( QY ) was ~ 50 % when the feed ratio of Cd ( 2 + ) to Hg ( 2 + ) was equal to 1 .
 Chemical: Cd ( 2 + ); Chemical: Hg ( 2 + )
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: Cd ( 2 + ); Chemical: Hg ( 2 + )