6246
X - ray crystallographic determination of the structure of the Ca ( 2 + ) / CaM : Kv7 . 4 B segment complex shows that Ca ( 2 + ) / CaM wraps around the Kv7 . 4 B segment , which forms an alpha - helix , in an antiparallel orientation that embodies a variation of the classic 1 - 14 Ca ( 2 + ) / CaM interaction motif .
 Chemical: Ca ( 2 + ); Chemical: Ca ( 2 + ); Chemical: Ca ( 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 + ), Ca ( 2 + ), Ca ( 2 + ) 
Answer:
 Chemical: Ca ( 2 + ); Chemical: Ca ( 2 + ); Chemical: Ca ( 2 + )