Complex sentence: Cyclonic effects in the North coast, New South Wales killed 46 people in 1923, and the 1969 storm at Kempsey killed 21, through the loss of a ship.
Split into simpler sentences: Cyclonic effects in the North coast, New South Wales killed 46 people in 1923. In 1969 there was a storm at Kempsey that killed 21 because of the loss of a ship.