Question: Briefly define sentiment classification and use one example review of a wireless speaker to illustrate it.

Sample answer: Sentiment classification is the task of deciding whether a piece of text expresses a positive or negative opinion. For example, the review "This speaker has rich sound and works perfectly" would be classified as positive because it shows approval.

Key points:

• Sentiment classification identifies whether text is favorable or unfavorable.
• A correct example should match the label implied by the wording.

Rubric: Full credit: gives an accurate definition and a correct illustrative example. Partial credit: gives only the definition or only a valid example. No credit: provides an incorrect definition or an example that does not match the sentiment.