Complex sentence: On 7 January 1951, one of these, HMTS "Prase", grounded in a heavy snowstorm, and after arduous attempts to salvage her, "English" destroyed the corvette with gunfire.
Split into simpler sentences: On 7 January 1951, one of the corvettes,, grounded in a heavy snowstorm. After unsuccessful attempts to salvage her, "English" destroyed the corvette with gunfire.