question: hereafter bulgar refers only to the bulgars in the balkans that ruled over a slavic population.
Capitalize this past sentence correctly.
A: Hereafter Bulgar refers only to the Bulgars in the Balkans that ruled over a Slavic population.

question: and there are now at large tasks: in september, the municipal election in braunschweig. since it is very much to organize: put up posters, then hang, design and print flyers, and so on.
Capitalize this past sentence correctly.
A: And there are now at large tasks: in September, the municipal election in Braunschweig. Since it is very much to organize: Put up posters, then hang, Design and print flyers, and so on.

question: their son niels was married to karen, the daughter of councilman anders sørensen klyn.
Capitalize this past sentence correctly.
A: Their son Niels was married to Karen, the daughter of Councilman Anders Sørensen Klyn.