Complex sentence: On 8 February, B-Dienst alerted the German warships of convoy HX-106 which sailed from Halifax, Nova Scotia on 31 January, escorted by, armed with eight 15-inch guns.
Split into simpler sentences: On 8 February, B-Dienst alerted the German warships of convoy HX-106 which sailed from Halifax, Nova Scotia on 31 January. The convoy was escorted by, armed with eight 15-inch guns.