Task: Text Simplification
Input (English): history and mandate the drug enforcement administration was established on 1 july 1973 , by reorganization plan no. 2 of 1973 , signed by president richard nixon on 28 march 1973.
Output (English): history and mandate the drug enforcement administration was started on 1 july 1973 , by reorganization plan no. 2 of 1973 , signed by president richard nixon on 28 march 1973.