Task: Question Answering
Input (English): Question: The most frequent malignant tumor of the submaxillary gland is: 
 Options:  <1> Mucoepidermoid carcinoma. <2> Carcinoma ex-pleomorphic adenoma. <3> Lymphoma <4> Cylindroma or cystic adenoid carcinoma. <5> Papillomatous cystadedenolymphoma.
Output (English): 4