Conversation so far:
Was Władysław Gomułka a leader in any wars?
Władysław Gomułka was the de facto leader of post-war Poland until 1948.
Where was Władysław Gomułka born?
Krosno, Austria-Hungary
Where did Władysław Gomułka attend schools?
Władysław Gomułka attended schools in Krosno for six or seven years, until the age of thirteen, when he had to start an apprenticeship in a metalworks shop.
Was Władysław Gomułka an activist at all?
Władysław Gomułka was known for his activism in the metal workers and, from 1922, chemical industry unions.

Question: Did he ever work in a refinery?
Self-contained rewrite: Did Władysław Gomułka ever work in a refinery?