Complex sentence: On 21 May, some artifacts were transported from the Palmyra museum to Damascus for safekeeping; a number of Greco-Roman busts, jewelry, and other objects looted from the museum have been found on the international market.
Split into simpler sentences: On 21 May, some artifacts were transported from the Palmyra museum to Damascus for safekeeping. A number of Greco-Roman busts, jewelry, and other objects looted from the museum have been found on the international market.