One of the following sentences is nonsensical. Which one is it?
Options:
- Sentence A: "The principle of windmills is to generate electricity by means of a cloud."
- Sentence B: "The principle of windmills is to generate electricity by means of the wind."
 Let's reason step by step:
user
Clouds can't be used to generate electricity and windmills don't use clouds either. Final answer: Sentence A.
assistant