Simplify the following text for a Grade 12 native English-speaking person.
Original: The term `` Armenian Question '' as used in European history , became common place among diplomatic circles and in the popular press after the Congress of Berlin ; that in like Eastern Question , refers to powers of Europe 's involvement to the Armenian subjects of the Ottoman Empire beginning with the Russo-Turkish War of 1877-78 .
Simplified: The term `` Armenian Question '' refers to powers of Europe 's involvement to the Armenian subjects of the Ottoman Empire beginning with the Russo-Turkish War of 1877-78 .