Simplify the following text for a Grade 12 native English-speaking person.
Original: After 4 October 1958 French constitutional referendum , the `` RÃ publique Soudanaise '' became a member of the French Community , once again with the name French Sudan , and gained complete internal autonomy 25 November 1958 .
Simplified: After the October 4 , 1958 French vote about the constitution , the `` RÃ publique Soudanaise '' joined the French Community , again with the name French Sudan , and it gained complete domestic control on 25 November , 1958 .