Original sentence: Manuel Abreu-Castillo was a lawyer who, as the youngest President of the Puerto Rico Bar Association led a delegation of 11 lawyers from Puerto Rico during the civil rights demonstration at which Dr.gave his famous "I Have a Dream" speech before the Lincoln Memorial in Washington, DC
Edited sentence: He was a member of Phi Sigma Alpha Fraternity.Manuel Abreu-Castillo was a prominent lawyer who, as the youngest President of the Puerto Rico Bar Association led a delegation of 11 lawyers from Puerto Rico during the civil rights demonstration at which Dr.gave his famous I Have a Dream speech before the Lincoln Memorial in Washington, DC