I want to know the answer to the following question:
Who argued that the Old East Slavic Slavuta for the Dnieper River was derived from slova?
All the background I'm provided with is that "The Old East Slavic Slavuta for the Dnieper River was argued by Henrich Bartek (1907–1986) to be derived from slova and also the origin of Slovene.". Is that enough to answer the question?