Complex sentence: In January 1913 a monk by the name of David, who was a supporter of "imiaslavie", was elected as the hegumen of the Andreyevsky skete, taking the place of the monk Hieronim who was an opponent of it.
Split into simpler sentences: In January 1913 a monk by the name of David, who was a supporter of Imiaslavie, was elected as the hegumen of the Andreyevsky skete. He took the place of the monk Hieronim who was an opponent of it.