Complex sentence: Under his guidance, the influence of the "Moscow News", rose to new heights and it acquired a semi-official character, although owned by the university until 1909, when it was taken over by the Black Hundred circles.
Split into simpler sentences: Under his guidance, the influence of the "Moscow News", rose to new heights. It gradually acquired a semi-official character, although owned by the university until 1909, when it was taken over by the Black Hundred circles.