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.

Shanghai (Chinese: 上海; Wu Chinese: Wu pronunciation; Mandarin: (ʂâŋ. xài) (listen)) is one of the four municipalities under the direct administration of the central government of China, the largest city in China by population, and the second most populous city proper in the world, with a population of more than 24 million as of 2017. It is a global financial centre and transport hub, with the world's busiest container port. Located in the Yangtze River Delta, it sits on the south edge of the estuary of the Yangtze in the middle portion of the East China coast. The municipality borders the provinces of Jiangsu and Zhejiang to the north, south and west, and is bounded to the east by the East China Sea.
where is shanghai located on the world map

Gutenberg in 1439 was the first European to use movable type. Among his many contributions to printing are: the invention of a process for mass-producing movable type; the use of oil-based ink for printing books; adjustable molds; mechanical movable type; and the use of a wooden printing press similar to the agricultural screw presses of the period. His truly epochal invention was the combination of these elements into a practical system that allowed the mass production of printed books and was economically viable for printers and readers alike. Gutenberg's method for making type is traditionally considered to have included a type metal alloy and a hand mould for casting type. The alloy was a mixture of lead, tin, and antimony that melted at a relatively low temperature for faster and more economical casting, cast well, and created a durable type.
who developed the first printing press in 1430

The case was brought by Mildred Loving (née Jeter), a woman of color, and Richard Loving, a white man, who had been sentenced to a year in prison in Virginia for marrying each other. Their marriage violated the state's anti-miscegenation statute, the Racial Integrity Act of 1924, which prohibited marriage between people classified as 'white' and people classified as 'colored'. The Supreme Court's unanimous decision determined that this prohibition was unconstitutional, overruling Pace v. Alabama (1883) and ending all race-based legal restrictions on marriage in the United States.

what previous case had created a precedent for striking down virginia’s law