Task: Text Simplification
Input (English): The Territory of Nebraska was an organized incorporated territory of the United States that existed from May 30 , 1854 , until March 1 , 1867 , when the final extent of the territory was admitted to the Union as the State of Nebraska .
Output (English): It existed from May 30 , 1854 , until March 1 , 1867 , when the part of the territory was admitted to the Union as the State of Nebraska .