Take better care of them. Or, try hitting ctrl+shift+c, and type in boolprop testing cheatsenabled true, just like that. Shift+click on a sim, and go through the options. I know there is something that says bring a sim back to life.
Sim On died in 1418.
Sim Hun died in 1936.
Sim Gokkes died in 1943.
Sim Visser died in 1983.
Sim Walton died in 1966.
Alastair Sim died on August 19, 1976 at the age of 75.
Sim Raleigh died on 1934-12-01.
William Alexander Sim died in 1928.
Thomas Sim Lee died in 1819.
Thomas Robertson Sim died in 1938.
Bird Sim Coler died in 1941.
Wilfrid Joseph Sim died in 1974.