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.

The Yellow Sea is the name given to the northern part of the East China Sea, which is a marginal sea of the Pacific Ocean. It is located between mainland China and the Korean Peninsula. Its name comes from the sand particles from Gobi Desert sand storms that turn the surface of the water golden yellow.
where is the yellow sea located on a world map

'Living for the City' is a 1973 single by Stevie Wonder from his Innervisions album. It reached number 8 on the Billboard Hot 100 chart and number 1 on the R&B chart. Rolling Stone ranked the song number 105 on their list of the '500 Greatest Songs of All Time'.
who sings the song just enough for the city

During the American Civil War (1861 -- 1865), the Union referred to the United States of America and specifically to the national government of President Abraham Lincoln and the 20 free states, 4 border and slave states (some with split governments and troops sent both north and south) that supported it. The Union was opposed by 11 southern slave states (or 13, according to the Southern view and one western territory) that formed the Confederate States of America, or also known as 'the Confederacy'.

who were the union and who were the confederates