Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sloppy and Careless Thriller

Crichton at his best builds his novel with careful research and attention to detail, which is why Jurassic Park is so disappointing. Dinosaurs get out when electric fences fail, even though they are supposed to be enclosed by moats as well. Rivers seem to flow up hill. Basic addition fails (the sum of three closely related normal distributions is not a three-peaked distribution). The chaos theory is profoundly misunderstood: most chaotic systems are in fact tightly bounded. The biology is also bad. Although Crichton gives lip service to warm-blooded dinosaurs, major plot devices link them to amphibians in unrealistic ways. Crichton would have been better served by either making the book a shameless fantasy or by taking the time to get the details right; but pretending to a meticulousness that is so repeatedly betrayed makes the book frustrating to read.