10134
This paper explores the potential for using a smaller suite of experiments that includes simultaneous titrations with Ca ( 2 + ) and Mg ( 2 + ) at different ratios of the two ions .
 Chemical: Ca ( 2 + ); Chemical: Mg ( 2 + )
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Ca ( 2 + ), Mg ( 2 + ) 
Answer:
 Chemical: Ca ( 2 + ); Chemical: Mg ( 2 + )