Task: Text Categorization
Input (English): Question: What is the most important prognostic factor in Stage 1 Melanoma? 
 Options:  <0> Serum LDH level. <1> Tumor thickness measured in the Breslow index. <2> The presence of clinical or histological ulceration. <3> Number of metastases. <4> The mitotic index. The mitotic index.
Output (English): medicine