In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

[EX Q]: Why do birds possess gizzards?, Context: Like the reptiles, birds are primarily uricotelic, that is, their kidneys extract nitrogenous waste from their bloodstream and excrete it as uric acid instead of urea or ammonia through the ureters into the intestine. Birds do not have a urinary bladder or external urethral opening and (with exception of the ostrich) uric acid is excreted along with feces as a semisolid waste. However, birds such as hummingbirds can be facultatively ammonotelic, excreting most of the nitrogenous wastes as ammonia. They also excrete creatine, rather than creatinine like mammals. This material, as well as the output of the intestines, emerges from the bird's cloaca. The cloaca is a multi-purpose opening: waste is expelled through it, most birds mate by joining cloaca, and females lay eggs from it. In addition, many species of birds regurgitate pellets. Males within Palaeognathae (with the exception of the kiwis), the Anseriformes (with the exception of screamers), and in rudimentary forms in Galliformes (but fully developed in Cracidae) possess a penis, which is never present in Neoaves. The length is thought to be related to sperm competition. When not copulating, it is hidden within the proctodeum compartment within the cloaca, just inside the vent. The digestive system of birds is unique, with a crop for storage and a gizzard that contains swallowed stones for grinding food to compensate for the lack of teeth. Most birds are highly adapted for rapid digestion to aid with flight. Some migratory birds have adapted to use protein from many parts of their bodies, including protein from the intestines, as additional energy during migration.
[EX A]: contains swallowed stones for grinding food to compensate for the lack of teeth

[EX Q]: How known was the phrase used?, Context: The only words of Jesus on the cross in the Mark and Matthew accounts, this is a quotation of Psalm 22. Since other verses of the same Psalm are cited in the crucifixion accounts, it is often considered a literary and theological creation. Geza Vermes, however, points out that the verse is cited in Aramaic rather than the Hebrew in which it usually would have been recited, and suggests that by the time of Jesus, this phrase had become a proverbial saying in common usage. Compared to the accounts in the other Gospels, which he describes as 'theologically correct and reassuring', he considers this phrase 'unexpected, disquieting and in consequence more probable'. He describes it as bearing 'all the appearances of a genuine cry'. Raymond Brown likewise comments that he finds 'no persuasive argument against attributing to the Jesus of Mark/Matt the literal sentiment of feeling forsaken expressed in the Psalm quote'.
[EX A]: in common usage

[EX Q]: Which popular areas for night life are nearest to city centre?, Context: There are concentrations of pubs, bars and nightclubs around the Bigg Market and the Quayside area of the city centre. There are many bars on the Bigg Market, and other popular areas for nightlife are Collingwood Street, popularly referred to as the 'Diamond Strip' due to its concentration of high-end bars, Neville Street, the Central Station area and Osborne Road in the Jesmond area of the city. In recent years "The Gate" has opened in the city centre, a new indoor complex consisting of bars, upmarket clubs, restaurants and a 12-screen Empire multiplex cinema. Newcastle's gay scene - 'The Pink Triangle' - is centred on the Times Square area near the Centre for Life and has a range of bars, cafés and clubs.
[EX A]:
Bigg Market and the Quayside