I removed the blank line at the start of the text file (don't know if that's relevant though) and renamed one of my images to "2015_09_23-Autumnal Equinox Sunrise Campus Scenes-tschoon-001.DNG" and applied the IPTC Stationery Pad with the Keywords field set to:
\{filenamebase}\
And then I applied the IPTC Stationery Pad to the file. The Keywords field now reads:
Campus, Time, Sunrise, Morning, Sky, Cloudy, Overcast, Gray, Grey, trees, The University of Iowa, buildings, College of Public Health Building, CPHB, AM, A.M., image detail, image orientation, horizontal, unrated, Seasons, Autumn, Autumnal Equinox, Fall, 2015_09_23-Autumnal Equinox Sunrise Campus Scenes-tschoon
I have attached the updated file.
HTH,
-Kirk