Complex sentence: This prompted an immediate response from the Polish media; as a retort, the next day "Gazeta Wyborcza" emphasized the formal admission by the Soviet Union of NKVD responsibility and republished documents to that effect.
Split into simpler sentences: This prompted an immediate response from the Polish media. As a retort, the next day, "Gazeta Wyborcza" emphasized the formal admission by the Soviet Union of NKVD responsibility and republished documents to that effect.