Complex sentence: Although some local residents were stunned by the NRA-led team's judgment, the mayor of Tsuruga, Mayor Kazuharu Kawase, said that the outcome was "very tough", but that additional investigations could possibly confirm the safety of the plants.
Split into simpler sentences: Although some local residents were stunned by the NRA-led team's judgment. The mayor of Tsuruga Mayor Kazuharu Kawase said that the outcome was "very tough" but that additional investigations could possibly confirm the safety of the plants.