Complex sentence: Lowry was named by Soviet intelligence agent Elizabeth Bentley as one of her contacts; she and Akhmerov and their actions on behalf of Soviet intelligence are referenced in several Venona project decryptions as well as Soviet KGB archives.
Split into simpler sentences: Lowry was named by Soviet intelligence agent Elizabeth Bentley as one of her contacts. Lowry, Akhmerov and their actions on behalf of Soviet intelligence are referred to in several Venona project decryptions as well as Soviet KGB archives.