Complex sentence: On November 29,1970, after a bomb exploded outside the Manhattan offices of the Soviet airline, Aeroflot, an anonymous caller to the Associated Press claimed responsibility and used the JDL slogan "Never again".
Split into simpler sentences: On November 29,1970, a bomb exploded outside the Manhattan offices of the Soviet airline, Aeroflot. An anonymous caller to the Associated Press claimed responsibility and used the JDL slogan "Never again".