Original sentence: In September 1890, Yeprem was arrested by the Russian Cossacks and exiled to Siberia by 1892, from where he managed to escape to Tabriz in 1896
Edited sentence: In September 1890, while trying to cross the Russo-Ottoman frontier with several hundred Armenian fighters to "foment disturbances and instigate European intervention in favor of reforms for Ottoman Armenians", Yeprem was arrested by the Russian Cossacks and exiled to Siberia by 1892, from where he managed to escape to Tabriz in 1896