Complex sentence: Popeye rows the half-destroyed U-boat to 10 Downing Street in London; he goes into fogginess and the half-destroyed U-boat ends up crashing into traffic, he is greeted with many cheers upon his arrival.
Split into simpler sentences: Popeye rows the half-destroyed U-boat to 10 Downing Street in London. He goes into a heavy fog and the half-destroyed U-boat ends up crashing into traffic, he is greeted with many cheers upon his arrival.