I want to know the answer to the following question:
Which language groups lived in Dalmation city-states prior to the 19th century?
All the background I'm provided with is that "This has been used as an argument to state that Croatian literature Croatian per se, but also includes Serbian and other languages that are part of Serbo-Croatian, These facts undermine the Croatian language proponents' argument that modern-day Croatian is based on a language called Old Croatian.". Is that enough to answer the question?
Answer: no