Task: Question Answering
Input (English): Context: Thanks all , I had a fantastic birthday . And it 's official - I pretty much have the best friends ever . Everyone was really sweet with their birthday wishes and I even got some surprise visits during the day . Went out in the evening to Two Small Rooms . Had n't been there in years , but it was awesome . 
Question: What may be the reason for them having a fantastic birthday ?
Output (English): Their friends had came out to celebrate .