Complex sentence: An early 1940s style known as "jumping the blues" or jump blues used small combos, uptempo music and blues chord progressions, drawing on boogie-woogie from the 1930s.
Split into simpler sentences: An early 1940s style known as "jumping the blues" or jump blues used small combos, uptempo music, and blues chord progressions. Jump blues drew on boogie-woogie from the 1930s.