Complex sentence: World War I recessions, but was shorter than recessions of 1910--12 and 1913--1914 (24 and 23 months respectively) and significantly shorter than the Great Depression (132 months).
Split into simpler sentences: World War I recessions, but was shorter than recessions of 1910--12 and 1913--1914 (24 and 23 months respectively). It was significantly shorter than the Great Depression (132 months).