Poll: Poll: Do you know where ____?
- Votes: 539
- Comments: 2
- Added: April 2008
- Polls: 1,165
- Votes: 686,193
- Comments: 4,841
it just sounds to me! apart from that, the verb "is" is not the main one in the sentence:there can be alternatives, and i think this is correct.
This is called an indirect question; it means that you are asking a question about a first question. The question form shoulb be followed only on the part "Do you know..."