1.
- Sherry hasn't been to the veterinary science building before.
- Sherry has been to the veterinary science building before.
2.
- Libre hasn't been to the veterinary science building before.
- Libre has been to the veterinary science building before.
3.
- The veterinary clinic is in the veterinary science building.
- The veterinary clinic is away from the veterinary science building.
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