Task: Question Answering
Input (English): I know you've been waiting for this . Immer treu . " She murmured his last words back to him , looking back down into her glass . He tossed some coins down on the bar and walked out as he had come in - without a notice to anyone else . 
Question: Why did he toss some coins onto the bar ?
Output (English): Because he needed to pay his tab .