Classify each of the following sentences into either one of the two categories: opinion or fact.
- The sky is orange. 
- Bears are cute.
- The sky is orange: Fact
- Bears are cute: Opinion
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Classify each of the following sentences into either one of the two categories: opinion or fact.

### Response:
- The sky is orange: Fact
- Bears are cute: Opinion