Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

[Q]: Most sedimentary rocks form from sediments. Sediments are small pieces of other rocks, like pebbles, sand, silt, and clay. Sedimentary rocks may include fossils. Fossils are materials left behind by once-living organisms. Fossils can be pieces of the organism, like bones. They can also be traces of the organism, like footprints. Most often, sediments settle out of water (Figure 4.13). For example, rivers carry lots of sediment. Where the water slows, it dumps these sediments along its banks, into lakes and the ocean. When sediments settle out of water, they form horizontal layers. A layer of sediment is deposited. Then the next layer is deposited on top of that layer. So each layer in a sedimentary rock is younger than the layer under it. It is older than the layer over it. Sediments are deposited in many different types of environments. Beaches and deserts collect large deposits of sand. Sediments also continuously wind up at the bottom of the ocean and in lakes, ponds, rivers, marshes, and swamps. Avalanches produce large piles of sediment. The environment where the sediments are deposited determines the type of sedimentary rock that can form. Sedimentary rocks form in two ways. Particles may be cemented together. Chemicals may precipitate. Over time, deposited sediments may harden into rock. First, the sediments are compacted. That is, they are squeezed together by the weight of sediments on top of them. Next, the sediments are cemented together. Minerals fill in the spaces between the loose sediment particles. These cementing minerals come from the water that moves through the sediments. These types of sedimentary rocks are called clastic rocks. Clastic rocks are rock fragments that are compacted and cemented together. Clastic sedimentary rocks are grouped by the size of the sediment they contain. Conglomerate and breccia are made of individual stones that have been cemented together. In conglomerate, the stones are rounded. In breccia, the stones are angular. Sandstone is made of sand-sized particles. Siltstone is made of smaller particles. Silt is smaller than sand but larger than clay. Shale has the smallest grain size. Shale is made mostly of clay-sized particles and hardened mud. Chemical sedimentary rocks form when crystals precipitate out from a liquid. The mineral halite, also called rock salt, forms this way. You can make halite! Leave a shallow dish of salt water out in the Sun. As the water evaporates, salt crystals form in the dish. There are other chemical sedimentary rocks, like gypsum. Table 4.1 shows some common types of sedimentary rocks and the types of sediments that make them up. Picture Rock Name Conglomerate Type of Sedimentary Rock Clastic Breccia Clastic Sandstone Clastic Siltstone Clastic Limestone Bioclastic Coal Organic Picture Rock Name Rock Salt Type of Sedimentary Rock Chemical precipitate
[A]: What are solid particles that have been deposited on the Earths surface called?


[Q]: NeXTSTEP (also stylized as NeXTstep, NeXTStep, and NEXTSTEP) is a combination of several parts: a Unix operating system based on the Mach kernel, plus source code from BSD Display PostScript and a proprietary windowing engine the Objective-C language and runtime an object-oriented (OO) application layer, including several ''kits'' development tools for the OO layers NeXTSTEP is notable for having been a preeminent implementation of the latter three items.
[A]: What is the programming language for NeXTSTEP?


[Q]: FORBES CHINA's annual celebrity list is based on income and appearances in magazines, newspapers, TV shows and online. Stars from the mainland, Taiwan and Hong Kong are included. And here are some of the winners: Jay Chou Taiwan singer, actor and director unveiled his 12th studio album, Opus 12, last December (Another "12''). New flick in the works: The Rooftop, being filmed in Taiwan and the mainland, which he stars in and also directs. 3. Andy Lau Now in his 50s, the evergreen Hong Kong star of song and film stayed popular last year with the movie Blind Detective. Lau's sixth film with Hong Kong actress Sammi Cheng is in the works. Jackie Chan Hong Kong movie industry icon last year released what may be his last action film CZ12, or Chinese Zodiac, which he wrote and directed. 5. Zhang Ziyi Popular actress had hit romantic comedy last year with My Lucky Star, which she also produced. Appears in this year's star-laden The Grandmaster kung fu movie, directed by Hong Kong's Wong Kar-Wai and also starring Tony Leung. 7. Yang Mi Actress was named most popular female singer in mainland China last year in a joint CCTV-MTV event. Last year's flicks included Love in the Buff, Beijing Love Story and Wu Dang. Has endorsement deals with Pepsi and cosmetics brand Wetcode. 8. Huang Xiaoming Actor turned up in several successful films last year, including Love in the Buff, An Inaccurate Memoir and White-Haired Witch. Promotes Baleno, Tissot, Olay. 10. Lin Chi-ling Taiwan TV hostess, model and actress. Most recent success: romantic comedy Say Yes, which took in more than $30 million in China.
[A]:
Who is the director of the Grandmaster ?