Complex sentence: In 1946 Lainer was released by the Americans, but was illegally re-arrested by the French and made to carry out dangerous de-mining operations, but at the end of 1946, he escaped again and returned to his hometown in Austria.
Split into simpler sentences: In 1946 Lainer was released by the Americans, but was re-arrested by the French and made to carry out dangerous de-mining operations. At the end of 1946 he escaped again and returned to his hometown in Austria.