Question: In a few sentences, explain what sentiment classification is and analyze why 'This is a great mop!' and 'This mop is low quality--I regret buying it.' represent opposite sentiment categories.

Sample answer: Sentiment classification is the task of recognizing whether a piece of text, such as a product review, expresses a positive or negative opinion. 'This is a great mop!' uses positive language ('great') that signals satisfaction, making it highly positive. In contrast, 'This mop is low quality--I regret buying it.' uses negative language ('low quality,' 'regret') that signals dissatisfaction, making it highly negative. Together these examples show how word choice and expressed emotion determine the sentiment label.

Key points:

• Sentiment classification identifies positive vs. negative opinions in text
• 'This is a great mop!' is an example of a highly positive review
• 'This mop is low quality--I regret buying it.' is an example of a highly negative review
• Word choice signals the sentiment expressed

Rubric: Full credit: correctly defines sentiment classification and explains why each example is positive or negative based on the language used. Partial credit: defines sentiment classification but does not analyze both examples. No credit: incorrect or missing definition.