Complex sentence: Their short range and lack of endurance was considered by Vian to be a severe handicap for the BPF, which returned to action on 4 May and again attacked targets in the Sakishima Islands.
Split into simpler sentences: Their short range and lack of endurance was considered by Vian to be a severe handicap for the BPF. The BPF returned to action on 4 May and again attacked targets in the Sakishima Islands.