@snailboat can anyone tell me if my answer on this is wrong?

oops, didn't mean to address anyone specifically

@snailboat What about "How to say a movie about someone, not someone made that movie"

then in post,

How do I say these movies in Japanese? An example to illustrate what I mean is: [etc]

@snailboat, definitely see how this works with 大分・とても etc. But I don't fully see this with 主に: it still looks to me like 主に isn't modifying the 体言 directly. Maybe I'm just not thinking of the right examples.