TASK DEFINITION: In this task, you are given a question and a context passage. You have to answer the question based on the given passage.
PROBLEM: How common are carbonates and deposits in North America?, Context: To the north of Africa the Tethys Sea continued to narrow. Broad shallow seas advanced across central North America (the Western Interior Seaway) and Europe, then receded late in the period, leaving thick marine deposits sandwiched between coal beds. At the peak of the Cretaceous transgression, one-third of Earth's present land area was submerged. The Cretaceous is justly famous for its chalk; indeed, more chalk formed in the Cretaceous than in any other period in the Phanerozoic. Mid-ocean ridge activity—or rather, the circulation of seawater through the enlarged ridges—enriched the oceans in calcium; this made the oceans more saturated, as well as increased the bioavailability of the element for calcareous nanoplankton. These widespread carbonates and other sedimentary deposits make the Cretaceous rock record especially fine. Famous formations from North America include the rich marine fossils of Kansas's Smoky Hill Chalk Member and the terrestrial fauna of the late Cretaceous Hell Creek Formation. Other important Cretaceous exposures occur in Europe and China. In the area that is now India, massive lava beds called the Deccan Traps were laid down in the very late Cretaceous and early Paleocene.

SOLUTION: widespread

PROBLEM: What has to be done with lights in order for them to work?, Context: Entry lights can be used outside to illuminate and signal the entrance to a property. These lights are installed for safety, security, and for decoration.

SOLUTION: installed

PROBLEM: Some defeated people became?, Context: Yet controlling the "Mandate of Heaven" was a daunting task. The vastness of China's territory meant that there were only enough banner troops to garrison key cities forming the backbone of a defense network that relied heavily on surrendered Ming soldiers. In addition, three surrendered Ming generals were singled out for their contributions to the establishment of the Qing dynasty, ennobled as feudal princes (藩王), and given governorships over vast territories in Southern China. The chief of these was Wu Sangui, who was given the provinces of Yunnan and Guizhou, while generals Shang Kexi and Geng Jingzhong were given Guangdong and Fujian provinces respectively.

SOLUTION:
feudal princes