Simplify the following text for a Grade 11 native English-speaking person.
Original: The International 's permanent executive and information body was the International Socialist Bureau ( ISB ) , based in Brussels and formed after the International 's Paris Congress of 1900 .
Simplified: The International 's permanent executive and information body was the International Socialist Bureau ( I.S.B. ) , in Brussels and formed after the International 's Paris Congress of 1900 .