You will be given a definition of a task first, then some input of the task.
Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Air mattress: Looks good, works but requires frequent running of pump. Appears to lose air through the built-in pump. Should have returned the mattress but need the bed for visitor. Probable would not buy with built-in pump in future.
Output:
Negative