Simplify the following text for a Grade 8 native English-speaking person.
Original: It is headed by the First Mayor of Hamburg ( German title : Erster BÃ 1\/4 rgermeister der Freien und Hansestadt Hamburg ) as the President of the Senate .
Simplified: He is the President of the Senate ( government ) of Hamburg . The Erster BÃ 1\/4 rgermeister is Hamburg 's Minister President .