Input: Read this: Originally, the hardware architecture was so closely tied to the Mac OS operating system that it was impossible to boot an alternative operating system. The most common workaround, is to boot into Mac OS and then to hand over control to a Mac OS-based bootloader application. Used even by Apple for A/UX and MkLinux, this technique is no longer necessary since the introduction of Open Firmware-based PCI Macs, though it was formerly used for convenience on many Old World ROM systems due to bugs in the firmware implementation.[citation needed] Now, Mac hardware boots directly from Open Firmware in most PowerPC-based Macs or EFI in all Intel-based Macs.
Question: What were Open Firmware-based PCI Macs used as a convenience because of?

Output: bugs in the firmware implementation


Input: Read this: High levels of precipitation cause the glaciers to descend to permafrost levels in some areas whereas in other, more arid regions, glaciers remain above about the 3,500 m (11,483 ft) level. The 1,817 square kilometres (702 sq mi) of the Alps covered by glaciers in 1876 had shrunk to 1,342 km2 (518 sq mi) by 1973, resulting in decreased river run-off levels. Forty percent of the glaciation in Austria has disappeared since 1850, and 30% of that in Switzerland.
Question: What cause the glaciers to descend to permafrost levels in some areas? 

Output: High levels of precipitation


Input: Read this: In early 2009, Spielberg shot the first film in a planned trilogy of motion capture films based on The Adventures of Tintin, written by Belgian artist Hergé, with Peter Jackson. The Adventures of Tintin: The Secret of the Unicorn, was not released until October 2011, due to the complexity of the computer animation involved. The world premiere took place on October 22, 2011 in Brussels, Belgium. The film was released in North American theaters on December 21, 2011, in Digital 3D and IMAX. It received generally positive reviews from critics, and grossed over $373 million worldwide. The Adventures of Tintin won the award for Best Animated Feature Film at the Golden Globe Awards that year. It is the first non-Pixar film to win the award since the category was first introduced. Jackson has been announced to direct the second film.
Question: How much did Adventures of Tintin earn?

Output: over $373 million worldwide


Input: Read this: Lossy data compression is the converse of lossless data compression. In these schemes, some loss of information is acceptable. Dropping nonessential detail from the data source can save storage space. Lossy data compression schemes are designed by research on how people perceive the data in question. For example, the human eye is more sensitive to subtle variations in luminance than it is to the variations in color. JPEG image compression works in part by rounding off nonessential bits of information. There is a corresponding trade-off between preserving information and reducing size. A number of popular compression formats exploit these perceptual differences, including those used in music files, images, and video.
Question: What can save storage space?

Output:
Dropping nonessential detail from the data source