Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Starving by dinner time

I've only been on this diet for two weeks, but I haven't noticed any signifigant weight loss. The problem with this diet is that during the day I feel light-headed and, as a student, have trouble with my memory. By dinner time, my reward meal, I am starving. For example, I can wolf down a bowl of pasta, a bowl of cereal, a huge bagel, and a peanut butter sandwich within an hour and still feel hungry. I hardly see how consuming over a thousand calories in an hour is going to benefit me. I know carbohydrates are the reason I'm overweight (seeing as how I eat under 1,500 calories a day and jog 5 miles without losing a pound), but it seems as if a fine balance between them and protein is the way to go.