Original sentence: March 16: The Shimane Prefecture assembly declares "Takeshima Day" to commemorate the centennial anniversary of Japan's claim to Liancourt Rocks, starting a wave of protests in South Korea
Edited sentence: March 16: The Shimane Prefecture assembly declares "Takeshima Day" to commemorate the centennial anniversary of Japan's claim to Liancourt Rocks (known as Takeshima in Japan, and Dokdo in Korea), starting a wave of protests in South Korea