In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

Input: Consider Input: The Oregon Trail is a 2,170-mile (3,490 km) historic East -- West, large-wheeled wagon route and emigrant trail in the United States that connected the Missouri River to valleys in Oregon. The eastern part of the Oregon Trail spanned part of the future state of Kansas, and nearly all of what are now the states of Nebraska and Wyoming. The western half of the trail spanned most of the future states of Idaho and Oregon.

Output: what was the main route that settlers took to oregon

Input: Consider Input: Hilary Erhard Duff (born September 28, 1987) is an American actress, singer, songwriter, businesswoman, and author. Duff began her acting career at a young age and quickly became labeled a teen idol as the title character of the Disney Channel television series Lizzie McGuire (2001 -- 2004) and in the theatrical film based off the series, The Lizzie McGuire Movie (2003). Thereafter, Duff appeared in numerous films, with leading roles in Agent Cody Banks (2003), Cheaper by the Dozen (2003), A Cinderella Story (2004), and Cheaper by the Dozen 2 (2005). After experiencing commercial and critical failure in Material Girls (2006), Duff began appearing in independent films such as War, Inc. (2008), According to Greta (2009), and Bloodworth (2010). Since 2015, she has starred as Kelsey Peters on the TV Land comedy-drama series Younger, for which she has received nominations for People's Choice Awards in 2016 and 2017.

Output: how old was hilary duff a cinderella story

Input: Consider Input: The novel charts the adventures of modern-day twelve-year-old Percy Jackson as he discovers he is a demigod, the son of a mortal woman and the Greek god Poseidon. Percy and his friends Annabeth Chase and Grover Underwood go on a quest to find Zeus' stolen lightning bolt and prevent a war between the gods Zeus, Poseidon, and Hades.
Output: what is the book percy jackson and the lightning thief about