We're getting to the end of 1946! This is the third writing category, this one honoring works adapted from other works. You notice I don't say other mediums: that's because one of the nominees is not from a short story or play or novel, but from an Original Motion Picture Story. That is to say, it was always meant for the cinema, just that the credited screenwriters weren't all necessarily the original conceivers of the tale. We've covered the distinction before, you get it by now.
The nominees: