Task: Sentiment Analysis
Input (English): This stuff will give you a marked energy boost. Note that every person is different.  For me, this lasted 3 hours before the crash.  (Not a sugar crash.) But my heart was pounding like it wanted to burst through my chest.  So I only drink half at a time (like another reviewer) and it works, without the scary heart acceleration.  It's even tasty.
Output (English): Positive