Complex sentence: The 2nd and 3rd Colonial divisions advanced between XXXV Corps and the river and overran the first line of the German 121st Division, holding the line south from the Somme, in fifteen minutes and took Dompierre and Bequincourt.
Split into simpler sentences: The 2nd and 3rd Colonial divisions, advanced between XXXV Corps and the river. They overran the first line of the German 121st Division, holding the line south from the Somme, in just fifteen minutes and took Dompierre and Bequincourt.