Classify the sentiment of the sentence: "I am disappointed in the quality of the product."
The sentiment of the sentence "I am disappointed in the quality of the product" is Negative.
Complete the following task based on the instruction and optional input provided.### Instruction:
Classify the sentiment of the sentence: "I am disappointed in the quality of the product."

### Output:
The sentiment of the sentence "I am disappointed in the quality of the product" is Negative.