Task: Question Answering
Input (English): I promise I'll try to keep it short . ( It's not as short as I hoped , sorry . ) Had the procedure today , but the prep for it was more frustrating than most other tests . Primarily because the prep was at home , and not in a hospital . 
Question: What's a possible reason the writer will try to keep it short ?
Output (English): Because they think their readers will prefer that .