Complex sentence: A day before the coup Wahad, who claimed to have information from the Egyptian intelligence service, warned al-Badr that Sallal and fifteen other officers, including Moghny, were planning a revolution.
Split into simpler sentences: A day before the coup al-Badr was warned by Wahad, who claimed to have information from the Egyptian intelligence service. He warned al-Badr that Sallal and fifteen other officers, including Moghny, were planning a revolution.