Task: Question Answering
Input (English): A sodium (Na) atom contains 11 protons, 12 neutrons, and 11 electrons. In order to make the sodium ion Na+, what must occur to the sodium atom?  
 (A) It must gain one electron. (B) It must lose one electron. (C) It must gain one proton. (D) It must lose one proton.
Output (English): B