Complex sentence: The History Museum of Armenia continually replenishes its collections with finds from current excavations made at ancient Armenian sites by the Institute of Archaeology and Ethnography and the National Academy of Sciences of Armenia.
Split into simpler sentences: The History Museum of Armenia continually replenishes its collections with current-day excavations made at ancient Armenian sites. Such items are found from scientific expeditions conducted by the Institute of Archaeology and Ethnography, as well as the National Academy of Sciences of Armenia.