an Entity references as follows:
The Catacomb culture (Russian: Катакомбная культура, romanized: Katakombnaya kul'tura, Ukrainian: Катакомбна культура, romanized: Katakombna kul'tura) was a Bronze Age culture which flourished on the Pontic steppe in 2500–1950 BC. Originating on the southern steppe as an outgrowth of the Yamnaya culture, the Catacomb culture came to cover a large area. It was probably Indo-European-speaking. Influences of the Catacomb culture have been detected as far as Mycenaean Greece. It spawned the Multi-cordoned ware culture and was eventually succeeded by the Srubnaya culture.