Complex sentence: The fourth trove (hidden in the 1st half of the 11th century, found in 1976) consists of fifty three one-piece and 1298 crumbled currencies, struck during the Ravvadid, Shaddadid and Shirvanshah periods.
Split into simpler sentences: The fourth trove was hidden in the 1st half of the 11th century and found in 1976. It consists of 53 complete and 1298 crumbled coins, struck during the Ravvadid, Shaddadid and Shirvanshah periods.