Task: Text Simplification
Input (English): atlantic hurricane seasons pre-1600 1600s / 10s 1620s / 30s observation data for years before 1492 is completely unavailable because record keeping was virtually non-existent in the pre-columbian era , and any records that may have once existed have long since been lost.
Output (English): atlantic hurricane seasons pre-1600 1600s / 10s 1620s / 30s observation data years before 1492 is all unavailable because record keeping did not exist in the pre-columbian era , and any records that may have existed have been lost.