Task: Text Categorization
Input (English): Question: In the formation of the skin they intervene: 
 Options:  <0> Only the ectoderm. <1> The ectoderm, mesoderm and cells of the neural crest. <2> The ectoderm and mesoderm. <3> The ectoderm and cells of the neural crest. <4> Only the mesoderm.
Output (English): biology