Task: Question Answering
Input (English): Question: A 68-year-old patient has a tumor mass diagnosed of small cell lung carcinoma in the right main bronchus at 1 cm from the tracheal carina. Mediastinoscopy shows contralateral adenopathies that are positive. The recommended treatment would be: 
 Options:  <1> Chemotherapy with right pneumonectomy. <2> Surgery and subsequent radiotherapy of all affected ganglion chains. <3> Right pneumonectomy and posterior chemotherapy. <4> Chemotherapy and radiotherapy. <5> Radiotherapy.
Output (English): 4