Table:
text: Werner Hartenstein
Ships attacked
Ships attacked
Date_ Time_ Name_of_ship Flag Tonnage Fate
16February1942 08:01 Pedernales United Kingdom 4317 damaged at
16February1942 08:03 Oranjestad United Kingdom 2396 sunk at
16February1942 09:43 Arkansas United States 6452 damaged at
20February1942 11:31 Delplata United States 5127 sunk at
25February1942 02:19 La Carrière United Kingdom 5685 sunk at
27February1942 10:35 Macgregor United Kingdom 2498 sunk at
28February1942 11:17 Oregon United States 7017 sunk at
13May1942 03:58 Koenjit Netherlands 4551 sunk at
13May1942 03:58 Letitia Porter Netherlands 15 sunk at
13May1942 22:05 City of Melbourne United Kingdom 6630 sunk at
15May1942 02:54 Siljestad Norway 4301 sunk at
15May1942 20:59 Kupa Yugoslavia 4382 sunk at

Question: What is the name of the ship attacked by Werner Hartenstein on February 20, 1942?