Complex sentence: On 1 May 1942, the 88 ° "Gruppo" landed in Castelvetrano with 17 new machines (one crash landed on the Appennini Mountains); the units started operational service on 8 May, dropping 4AR mines.
Split into simpler sentences: On 1 May 1942, the 88 ° "Gruppo" landed in Castelvetrano with 17 new machines (one crash landed on the Appennini Mountains). The units started operational service on 8 May, dropping 4AR mines.