Complex sentence: This fortunate circumstance allowed a full-size wooden mock-up to be quickly constructed and presented to the Consultative Committee of the Assault Artillery on 16 and 17 January 1917, after the basic concept had been approved on 30 December.
Split into simpler sentences: This fortunate circumstance allowed a full-size wooden mock-up to be constructed in a remarkably quick time. The project was presented to the Consultative Committee of the Assault Artillery on 16 and 17 January 1917, after the basic concept had been approved on 30 December.