1. Sterling to respond to the charges in writing by May 27.

2. This is never something we want to have to respond to.

3. It is unclear how quickly or even whether Google will respond to the most recent complaints.

4. Apple and Google did not respond to requests for information about their policy in such cases.

5. Google did not respond to a request for comment on the reported product.

6. The company did not respond to multiple requests for comment from this newspaper.

7. Apple did not respond to a request for comment on whether the video will ever be released.

8. They will also have to respond to market trends and enterprise demands.

9. Google did not respond to a request for comment on the complaint.

10. Google did not respond to a request for comment on its policy.

11. It can respond to people moving around it and change its behaviour.

12. The time it takes to respond to these complaints has also decreased.

13. Twitter did not respond to a request for comment for this article.

14. Twitter did not respond to a request to comment for this story.

15. Facebook did not respond to requests for comment on the issues raised in this article.