Task: Text Categorization
Input (English): Question: The hormonal stimulation of the formation of the second messenger inositol 1,4,5-trisfosfato (IP3) quickly leads to the release of what other intracellular messenger: 
 Options:  <0> Cyclic AMP. <1> Prostaglandin <2> Calcium. <3> Leukotriene <4> Thromboxane
Output (English): chemistry