Complex sentence: The previous day she had been driven onto a lee shore by a gale while attempting to return to Falmouth.She had anchored, but when the cable parted at about 8 o'clock in the morning, she ran onto the sand and was soon broken up by the waves.
Split into simpler sentences: The previous day she had been driven onto a lee shore by a gale while attempting to return to Falmouth. Anchored but when the cable parted at about 8 o'clock in the morning, run onto the sand and was soon broken up by the waves.