Split Column into lines and remove dublicated from neigbour column|Power Query|Excel Forum|My Online Training Hub

Hello,

I try to tackle following challange:

I have an external list with a kind of "projects", where I asks different people for feedback.

In column "B" I have these people listed, and in column "C" I can see, from whom I got Feedback.

Now I need to figure out them, who are missing.

So in 5 of my 6 projects in total 10 missing feedback.

So the ideal result would look like this.

Until now I was only able, to split the origin column "B" into results and sort them into new lines.

But now I have no idea, how to proceed, and remove only them from my modified column "B", who is already listed in column "C"