Complex sentence: In Oakland, California, Kennedy met with Black Panthers amid other minority activists in a midnight session days before the California primary concluded, being shouted at but preventing a black aide from intervening: They need to tell people off.
Split into simpler sentences: In Oakland, California, Kennedy met with Black Panthers amid other minority activists in a midnight session days before the California primary concluded. When he was shouted at Kennedy prevented a black aide from intervening: They need to tell people off.