Complex sentence: In April 1941, she was damaged by a German plane at Devonport; on 28 July, "Surcouf" went to the United States Naval Shipyard at Portsmouth, New Hampshire for a three-month refit.
Split into simpler sentences: In April 1941, she was damaged by a German plane at Devonport. On 28 July, "Surcouf" went to the United States Naval Shipyard at Portsmouth, New Hampshire for a three-month refit.