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.

[Q]: The total length of the continental border is 1,954 miles (3,145 km). From the Gulf of Mexico, it follows the course of the Rio Grande (Río Bravo del Norte) to the border crossing at Ciudad Juárez, Chihuahua, and El Paso, Texas. Westward from El Paso -- Juárez, it crosses vast tracts of the Chihuahuan and Sonoran deserts to the Colorado River Delta and San Diego -- Tijuana, before reaching the Pacific Ocean.
[A]: where is the border between mexico and us


[Q]: Mount Rushmore National Memorial is a sculpture carved into the granite face of Mount Rushmore, a batholith in the Black Hills in Keystone, South Dakota, United States. Sculptor Gutzon Borglum created the sculpture's design and oversaw the project's execution from 1927 to 1941 with the help of his son, Lincoln Borglum. Mount Rushmore features 60-foot (18 m) sculptures of the heads of four United States presidents: George Washington (1732 -- 1799), Thomas Jefferson (1743 -- 1826), Theodore Roosevelt (1858 -- 1919), and Abraham Lincoln (1809 -- 1865). The memorial park covers 1,278.45 acres (2.00 sq mi; 5.17 km) and is 5,725 feet (1,745 m) above sea level.
[A]: name of the four presidents on mount rushmore


[Q]: 'The Legend of Sleepy Hollow' is a short story of speculative fiction by American author Washington Irving, contained in his collection of 34 essays and short stories entitled The Sketch Book of Geoffrey Crayon, Gent ... Written while Irving was living abroad in Birmingham, England, 'The Legend of Sleepy Hollow' was first published in 1820. Along with Irving's companion piece 'Rip Van Winkle', 'The Legend of Sleepy Hollow' is among the earliest examples of American fiction with enduring popularity, especially during Halloween because of a character known as the Headless Horseman believed to be a Hessian soldier who lost his head to a cannonball in battle.
[A]:
when was the legend of sleepy hollow written