3575
It is concluded that for lighter metal ions with smaller zeta values such as Zn ( II ) and Ca ( II ) , and to a lesser extent Cd ( II ) , that the CHEF effect can be achieved with pyridyl - containing fluorophores that coordinate directly to the metal ion .
 Chemical: Zn ( II ); Chemical: Ca ( II ); Chemical: Cd ( II ); Chemical: pyridyl
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: Zn ( II ); Chemical: Ca ( II ); Chemical: Cd ( II ); Chemical: pyridyl