Thread:Topdarlingwh/@comment-26863672-20151013175101/@comment-26863672-20151013185643

Ah. I see the problem. The second part of the sentence is not an independent clause though, which is where I think the confusion is coming from, so it doesn't fall under those guidelines. (It doesn't make sense as a stand-alone sentence.)

But I think I figured out a good re-structuring:

"...Project Blue Book, which was a series of investigations done by..."

I'll go add it now if you're cool with it.