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]: From what era, once thought devoid of animal life, was evidence of grazer populations discovered?, Context: Some paleontologists suggest that animals appeared much earlier than the Cambrian explosion, possibly as early as 1 billion years ago. Trace fossils such as tracks and burrows found in the Tonian period indicate the presence of triploblastic worms, like metazoans, roughly as large (about 5 mm wide) and complex as earthworms. During the beginning of the Tonian period around 1 billion years ago, there was a decrease in Stromatolite diversity, which may indicate the appearance of grazing animals, since stromatolite diversity increased when grazing animals went extinct at the End Permian and End Ordovician extinction events, and decreased shortly after the grazer populations recovered. However the discovery that tracks very similar to these early trace fossils are produced today by the giant single-celled protist Gromia sphaerica casts doubt on their interpretation as evidence of early animal evolution.
[EX A]: the Tonian period

[EX Q]: What term did the UK used to use to describe a period of time during someone's school aged years?, Context: Colloquially, the term university may be used to describe a phase in one's life: "When I was at university..." (in the United States and Ireland, college is often used instead: "When I was in college..."). In Australia, Canada, New Zealand, the United Kingdom, Nigeria, the Netherlands, Spain and the German-speaking countries university is often contracted to uni. In Ghana, New Zealand and in South Africa it is sometimes called "varsity" (although this has become uncommon in New Zealand in recent years). "Varsity" was also common usage in the UK in the 19th century.[citation needed] "Varsity" is still in common usage in Scotland.
[EX A]: Varsity

[EX Q]: Which coast is the snowiest?, Context: On average, the mountains of the western states receive the highest levels of snowfall on Earth. The greatest annual snowfall level is at Mount Rainier in Washington, at 692 inches (1,758 cm); the record there was 1,122 inches (2,850 cm) in the winter of 197172. This record was broken by the Mt. Baker Ski Area in northwestern Washington which reported 1,140 inches (2,896 cm) of snowfall for the 1998-99 snowfall season. Other places with significant snowfall outside the Cascade Range are the Wasatch Mountains, near the Great Salt Lake, the San Juan Mountains in Colorado, and the Sierra Nevada, near Lake Tahoe.
[EX A]:
western