Task: Question Answering
Input (English): Context: Today is Nathaniel 's first day of school . I miss him , but I am sure he is having a fabulous day ! He was so excited about being back at school . He told me he was awake at about 6:00 AM and could n't get back to sleep . 
Question: What may have caused Nathaniel to wake up at 6:00 AM ?
Output (English): He was anticipating today 's events .