The problem: Answer a question about this article:
Spring and autumn have, on average, mild days and fresh nights but are changing and unstable. Surprisingly warm or cool weather occurs frequently in both seasons. In winter, sunshine is scarce; days are cold but generally above freezing with temperatures around 7 C (45 F). Light night frosts are however quite common, but the temperature will dip below 5 C (23 F) for only a few days a year. Snow falls every year, but rarely stays on the ground. The city sometimes sees light snow or flurries with or without accumulation.
Does Paris see snow?
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The answer: sometimes sees light snow or flurries

Problem: Please answer a question about the following article about Tucson, Arizona:
The City of Tucson, Pima County, the State of Arizona, and the private sector have all made commitments to create a growing, healthy economy[citation needed] with advanced technology industry sectors as its foundation. Raytheon Missile Systems (formerly Hughes Aircraft Co.), Texas Instruments, IBM, Intuit Inc., Universal Avionics, Honeywell Aerospace, Sunquest Information Systems, Sanofi-Aventis, Ventana Medical Systems, Inc., and Bombardier Aerospace all have a significant presence in Tucson. Roughly 150 Tucson companies are involved in the design and manufacture of optics and optoelectronics systems, earning Tucson the nickname "Optics Valley".
What do the 'Optics Valley' companies do?
A: design and manufacture of optics and optoelectronics systems

Question: Read this and answer the question

In 121 BC, Han forces expelled the Xiongnu from a vast territory spanning the Hexi Corridor to Lop Nur. They repelled a joint Xiongnu-Qiang invasion of this northwestern territory in 111 BC. In that year, the Han court established four new frontier commanderies in this region: Jiuquan, Zhangyi, Dunhuang, and Wuwei. The majority of people on the frontier were soldiers. On occasion, the court forcibly moved peasant farmers to new frontier settlements, along with government-owned slaves and convicts who performed hard labor. The court also encouraged commoners, such as farmers, merchants, landowners, and hired laborers, to voluntarily migrate to the frontier.

How many commanderies in the new frontier were created by the Han court in the year 111 BC?
Answer: four

Problem: In London Chopin took lodgings at Dover Street, where the firm of Broadwood provided him with a grand piano. At his first engagement, on 15 May at Stafford House, the audience included Queen Victoria and Prince Albert. The Prince, who was himself a talented musician, moved close to the keyboard to view Chopin's technique. Broadwood also arranged concerts for him; among those attending were Thackeray and the singer Jenny Lind. Chopin was also sought after for piano lessons, for which he charged the high fee of one guinea (1.05 in present British currency) per hour, and for private recitals for which the fee was 20 guineas. At a concert on 7 July he shared the platform with Viardot, who sang arrangements of some of his mazurkas to Spanish texts.
What two notable guests were present during his premiere performance at Stafford House?
The answer is the following: Queen Victoria and Prince Albert

Under a banner of "reducing public drunkenness" the Beer Act of 1830 introduced a new lower tier of premises permitted to sell alcohol, the Beer Houses. At the time beer was viewed as harmless, nutritious and even healthy. Young children were often given what was described as small beer, which was brewed to have a low alcohol content, as the local water was often unsafe. Even the evangelical church and temperance movements of the day viewed the drinking of beer very much as a secondary evil and a normal accompaniment to a meal. The freely available beer was thus intended to wean the drinkers off the evils of gin, or so the thinking went.
What was the intention behind the passage of the Beer Act of 1830?
reducing public drunkenness

Here is a question about this article: Nearly all polychaetes have parapodia that function as limbs, while other major annelid groups lack them. Parapodia are unjointed paired extensions of the body wall, and their muscles are derived from the circular muscles of the body. They are often supported internally by one or more large, thick chetae. The parapodia of burrowing and tube-dwelling polychaetes are often just ridges whose tips bear hooked chetae. In active crawlers and swimmers the parapodia are often divided into large upper and lower paddles on a very short trunk, and the paddles are generally fringed with chetae and sometimes with cirri (fused bundles of cilia) and gills.
What is the answer to this question: What kind of parapodia do burrowing annelids often have?
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So...
ridges whose tips bear hooked chetae