Complex sentence: It begins at the literary event at which Sand and Musset met and ends with their final meeting, unlike the longer version which continues to show Sands attemptes to see the dying Musset and ends with her reading her letters to him by his tomb.
Split into simpler sentences: It begins at the literary event at which Sand and Musset met and ends with their final meeting. The longer version goes on to show Sand's attempts to see the dying Musset, and ends with her reading her letters to him by his tomb.