The fifth,as in the fifth amendment. It's a rule saying you can't be made to incriminate yourself. So pleading the fifth (amendment) is just saying that someone refuses to answer because they don't want to admit to doing something.

Yeah, there are churches. There's a lot of different kinds of them. And there are temples, what kind are you wondering about. I know where the Jewish temple is. Is that what your asking about? Or a different temple?