Assertion: ship convoy | /r/HasProperty | escorted by three destroyers
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Source sentences:
text: Operation Collar was intended to combine the passage of a battleship, heavy cruiser and light cruiser with mechanical defects from Alexandria to Gibraltar, with a four-ship convoy MW 4 to Malta and the sailing of ME 4 from Malta comprising Cornwall and the four empty ships from convoy MW 3, escorted by a cruiser and three destroyers.