not gonna make fun of you, but i don't think it's very commom to put a deceased person's address on their headstone lol...
UR. 2 WRZEŚNIA 1852
UM. 22 MARCA 1939
born 2nd September 1852
died 22nd March 1939
UR. 2 WRZESNIA
UM. 13 PA-DZIERNIKA 1935
born 2nd September
died 13 October 1935
ur. is a short for
urodzony(
urodzona if it's a female) which means
bornum. is a short for
umarł (
umarła if female) which means
died. you may also come accross
zm. which i think is sligthly more commom, means exactly the same and is a short for
zmarł (
zmarła)