That was about the only title I could think of that accurately describes the problem.
The situation is whenever you go somewhere and there are people/things there that you don't know. Instead of saying something like "I went there and there were people that I didn't know" or "I didn't know anybody who was there", some people try to combine the sentences "There were people there that I didn't know" and "I didn't even know who they were" for emphasis. The only thing wrong with that is that we run into a problem:
"There were people there that I didn't even know who they were."
"There were people there that I didn't even know who were."
The first sentence has an unnecessary "they" and the second one removes it but it sounds awkward.
What's the best way to say this?