Complex sentence: In 1914, the city changed back to its old name Shenyang but continued to be known as Mukden in some English sources (sometimes spelled Moukden) through much of the 20th century and in Japan until 1945.
Split into simpler sentences: In 1914, the city changed back to its old name Shenyang. Shenyang continued to be known as Mukden in some English sources (sometimes spelled Moukden) through much of the 20th century and in Japan until 1945.