Task: Information Extraction
Input (English):  "process paragraph : : Choose what you want to write your letter on. Think of what you want to say. Write some nice things!. Place the letter into an envelope. Put a stamp on the top right corner of the face of the envelope. Write the address of the recipient on the envelope. Put the envelope in your mailbox. Raise the flag on your mailbox, indicating to the mailman that you have outgoing mail. ", "event : Think of what you want to say.", "entity : envelope" 
Output (English):  unknown location