Sentenced to ten years of hard labor in the Siberian mines, he defied the Russian tyrant by his funeral oration at the grave of Dmokhovsky, his boldness resulting in an additional fifteen years of katorga.

All was quiet for several minutes until the fog broke and a large oak tree passed outside my portside window.

Do not try to fix a squinting modifier by inserting a comma to make your readers pause.

the female-to-male ratio is 3-to-5