1. One of those who attended and said they were unsure whether they would place a bid on.

2. Police said they were unsure when the released officer would return to the job.

3. He said he was unsure how many air bags that would amount to.

4. American officials are unsure if the former FBI agent is even still alive.

5. It left him unsure what to do on that fundamental question.

6. She told the paper she was unsure whether police obtained footage for his cameras.

7. Police are unsure how long the girl had been in the car before it was found by passing cyclists.

8. Analysts were unsure what the impact of the hacking might be.

9. If you are unsure of how you will react, go slowly.

10. Many people are unsure about exactly what machine learning is.

11. Their purpose is unknown, and archaeologists are unsure when these structures were built.

12. Groups of people ran from street to street, unsure which direction to go in.

13. Most people have stocked up on provisions, unsure of what to expect.

14. Meanwhile, researchers are unsure whether the ants get anything out of the relationship.

15. Still, others remain, unsure of when the call to leave might come.