14471
The differences in Ca (2) + cycling between sinoatrial node cells and ventricular myocytes provide insights into the regulation of intracellular Ca (2) + cycling that drives the automaticity of sinoatrial node cells .
 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) + 
Answer:
 Chemical: Ca (2) +; Chemical: Ca (2) +