Complex sentence: Two hundred and twenty five Lancaster and eleven Mosquito bombers from No.5 Group arrived over the city at about 21.30 hours (CET) and released 1,127 tons of bombs (including around 380,000 incendiaries) in seventeen minutes.
Split into simpler sentences: Two hundred and twenty five Lancaster and eleven Mosquito bombers from No.5 Group arrived over the city at about 21.30 hours (CET). The Lancasters released 1,127 tons of bombs (including around 380,000 incendiaries) in seventeen minutes.