Complex sentence: This system was exposed in the aftermath of the global financial crisis: out of the 45 cajas in existence at the start of the crisis in 2007, only two have survived in their initial form.
Split into simpler sentences: This system was exposed in the aftermath of the global financial crisis. As a result, out of the 45 cajas in existence at the start of the crisis in 2007, only two have survived in their initial form.