12079
Classification of structural cardiotoxins into mechanistic themes revealed mitochondria and calcium mobilization to be major distal targets , with only 4 out of 15 compounds affecting contractile function in freshly isolated canine cardiomyocytes at therapeutically relevant concentrations .
 Chemical: calcium
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: calcium