During the subsequent Nazi occupation (1941--1944), Lem, whose family had Jewish roots, survived with false papers, earning a living as a car mechanic and welder.
Lem survived with false papers. This was during the subsequent Nazi occupation (1941--1944). Lem was earning a living as a car mechanic and welder. This was during the subsequent Nazi occupation (1941--1944). Lem's family had Jewish roots.