<prompt> Pedzisa mutsara unotevera: Vasilko Konstantinovich ; 7 Zvita 1209, muRostov 4 Kurume 1238, muSherensky sango aive wekutanga Muchinda weRostov, Rus. Akanga ari mwanakomana waKonstantine weRostov, uye murume waMaria weChernigov. Akafira muhondo yeRwizi Sit munguva ye  <response>: Kupinda kwevaMongol muKievan Rus uye akatsiviwa nomwanakomana wake Boris. 