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 couldn't get back to sleep .
question: What may have caused Nathaniel to wake up at 6:00 AM ?
reference: He was anticipating today's events .
candidate: he told today events .