Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
For instance, a phased array consists of two or more simple antennas which are connected together through an electrical network. This often involves a number of parallel dipole antennas with a certain spacing. Depending on the relative phase introduced by the network, the same combination of dipole antennas can operate as a "broadside array" (directional normal to a line connecting the elements) or as an "end-fire array" (directional along the line connecting the elements). Antenna arrays may employ any basic (omnidirectional or weakly directional) antenna type, such as dipole, loop or slot antennas. These elements are often identical.
How are antennas oriented when arranged with specific spacing?
A: parallel

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Russia experienced territorial growth through the 17th century, which was the age of Cossacks. Cossacks were warriors organized into military communities, resembling pirates and pioneers of the New World. In 1648, the peasants of Ukraine joined the Zaporozhian Cossacks in rebellion against Poland-Lithuania during the Khmelnytsky Uprising, because of the social and religious oppression they suffered under Polish rule. In 1654 the Ukrainian leader, Bohdan Khmelnytsky, offered to place Ukraine under the protection of the Russian Tsar, Aleksey I. Aleksey's acceptance of this offer led to another Russo-Polish War (16541667). Finally, Ukraine was split along the river Dnieper, leaving the western part (or Right-bank Ukraine) under Polish rule and eastern part (Left-bank Ukraine and Kiev) under Russian. Later, in 167071 the Don Cossacks led by Stenka Razin initiated a major uprising in the Volga region, but the Tsar's troops were successful in defeating the rebels. In the east, the rapid Russian exploration and colonisation of the huge territories of Siberia was led mostly by Cossacks hunting for valuable furs and ivory. Russian explorers pushed eastward primarily along the Siberian river routes, and by the mid-17th century there were Russian settlements in the Eastern Siberia, on the Chukchi Peninsula, along the Amur River, and on the Pacific coast. In 1648 the Bering Strait between Asia and North America was passed for the first time by Fedot Popov and Semyon Dezhnyov.
When did Russia experience territorial growth?
A: the 17th century

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Starting as a fishing outpost for European fishermen, St. John's consisted mostly of the homes of fishermen, sheds, storage shacks, and wharves constructed out of wood. Like many other cities of the time, as the Industrial Revolution took hold and new methods and materials for construction were introduced, the landscape changed as the city grew in width and height. The Great Fire of 1892 destroyed most of the downtown core, and most residential and other wood-frame buildings date from this period.
what destroyed the city in the 18th century?
A: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Miami is noted as "the only major city in the United States conceived by a woman, Julia Tuttle", a local citrus grower and a wealthy Cleveland native. The Miami area was better known as "Biscayne Bay Country" in the early years of its growth. In the late 19th century, reports described the area as a promising wilderness. The area was also characterized as "one of the finest building sites in Florida." The Great Freeze of 189495 hastened Miami's growth, as the crops of the Miami area were the only ones in Florida that survived. Julia Tuttle subsequently convinced Henry Flagler, a railroad tycoon, to expand his Florida East Coast Railway to the region, for which she became known as "the mother of Miami." Miami was officially incorporated as a city on July 28, 1896 with a population of just over 300. It was named for the nearby Miami River, derived from Mayaimi, the historic name of Lake Okeechobee.
Prior to the naming of Miami, what was the area around Miami called?
A:
Biscayne Bay Country