Definition: Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title
Input: In Game of Thrones season 7 episode 3, we see the Lannister army invade and defeat house Tyrell in Highgarden. In fact, the fight is so one-sided that the writers of the show intentionally decided not to show the actual battle and instead jumped directly to the aftermath of fight. It's established in season 7 episode 1 that the Lannister army is running short of supplies and money, and house Tyrell is now the richest house in Westeros. How was it possible that the former so easily defeated the latter?
Output:
How was a powerful house so easily defeated?