Teacher:Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Teacher: Now, understand the problem? Solve this instance: I feel that these are a necessity especially if you live in colder winter climates where you may have the windows closed for a few months.I prefer this model as it plugs in to an outlet rather than battery operated units.I found the models through Amazaon were several dollars cheaper than stores around my area.
Student:
Positive