Original sentence: The second was Ľudovít Štúr, whose formation of the Slovak language took principles from the dialect of the central part of Upper Hungary (1843).Upper Hungary (1787)
Edited sentence: The second was Ľudovít Štúr, whose formation of the Slovak language took principles from the dialect of the central part of Upper Hungary (now in Slovakia) in 1843.Upper Hungary (now in Slovakia) in 1787