Task: Sentiment Analysis
Input (English): Proceed with Caution . This book gives lots of chemical demonstration ideas.  However, some are entirely too dangerous to do.  You must use a lot of common sense when considering doing any of these demonstrations.  Some are not safe at all.  Mercury and CCl4 are EPA regulated.  It's not advisable to put ethanol in your mouth to spit out in front of students...  This only demonstrates bad lab techniques.  Make sure you do the first experiment in the book outside or in a fume hood.  It releases a strong odor and an acid vapor.  Definitely not something you want your students breathing
Output (English): NEG