Complex sentence: Garin de Monglane, or Montglane, the creation of Conrad von Stöffler in 1280, is a fictional aristocrat who gives his name to the second cycle of Old French "chansons de geste", "La Geste de Garin de Monglane".
Split into simpler sentences: Garin de Monglane, or Montglane, is a fictional character created by Conrad von Stöffler in 1280. The character gives his name to the second cycle of Old French "chansons de geste", "La Geste de Garin de Monglane".