Complex sentence: After the second partition of Poland, Ternopil came under Austrian domination and Joseph Perl was able to continue his efforts to improve the condition of the Jews there, which he had begun under Russian rule.
Split into simpler sentences: After the second partition of Poland, Ternopil came under Austrian domination. Nevertheless, Joseph Perl was able to continue his efforts to improve the condition of the Jews, which he had begun under the Russian rule.