Task: Text Categorization
Input (English): Question: What group of amino acids, when they are part of the proteins, can be phosphorylated? 
 Options:  <0> Val, Ser, Thr. <1> Phe, Ala, Gly. <2> Val, Glu, Asp. <3> Tyr, Ser, Thr. <4> Lys, Ser, Ile.
Output (English): chemistry