Complex sentence: On this occasion, Farouk turned down Naguib's resignation, Naguib again attempting to resign in 1951 when Hussein Serri Amer, widely thought to be corrupt, was made head of the Coast Guard.
Split into simpler sentences: On this occasion, Farouk turned down Naguib's resignation. He again attempted to resign in 1951 when Hussein Serri Amer, widely thought to be corrupt, was made head of the Coast Guard.