Problem: Hellenistic period:

Hellenistic warfare was a continuation of the military developments of Iphicrates and Philip II of Macedon, particularly his use of the Macedonian Phalanx, a dense formation of pikemen, in conjunction with heavy companion cavalry. Armies of the Hellenistic period differed from those of the classical period in being largely made up of professional soldiers and also in their greater specialization and technical proficiency in siege warfare. Hellenistic armies were significantly larger than those of classical Greece relying increasingly on Greek mercenaries (misthophoroi; men-for-pay) and also on non-Greek soldiery such as Thracians, Galatians, Egyptians and Iranians. Some ethnic groups were known for their martial skill in a particular mode of combat and were highly sought after, including Tarantine cavalry, Cretan archers, Rhodian slingers and Thracian peltasts. This period also saw the adoption of new weapons and troop types such as Thureophoroi and the Thorakitai who used the oval Thureos shield and fought with javelins and the machaira sword. The use of heavily armored cataphracts and also horse archers was adopted by the Seleucids, Greco-Bactrians, Armenians and Pontus. The use of war elephants also became common. Seleucus received Indian war elephants from the Mauryan empire, and used them to good effect at the battle of Ipsus. He kept a core of 500 of them at Apameia. The Ptolemies used the smaller African elephant.

The Thorakitai used what type of oval shield?
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A: Thureos


Problem: Beyond the energy factors being considered, it is important not to over-design illumination, lest adverse health effects such as headache frequency, stress, and increased blood pressure be induced by the higher lighting levels. In addition, glare or excess light can decrease worker efficiency.
What can cause health effects such headache frequency?
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Answer: higher lighting levels


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Holes through a PCB are typically drilled with small-diameter drill bits made of solid coated tungsten carbide. Coated tungsten carbide is recommended since many board materials are very abrasive and drilling must be high RPM and high feed to be cost effective. Drill bits must also remain sharp so as not to mar or tear the traces. Drilling with high-speed-steel is simply not feasible since the drill bits will dull quickly and thus tear the copper and ruin the boards. The drilling is performed by automated drilling machines with placement controlled by a drill tape or drill file. These computer-generated files are also called numerically controlled drill (NCD) files or "Excellon files". The drill file describes the location and size of each drilled hole.
The dull file describes what?
A: unanswerable


Context and question: The decisive engagement of the war came when Lysimachus invaded and overran much of western Anatolia, but was soon isolated by Antigonus and Demetrius near Ipsus in Phrygia. Seleucus arrived in time to save Lysimachus and utterly crushed Antigonus at the Battle of Ipsus in 301 BCE. Seleucus' war elephants proved decisive, Antigonus was killed, and Demetrius fled back to Greece to attempt to preserve the remnants of his rule there by recapturing a rebellious Athens. Meanwhile, Lysimachus took over Ionia, Seleucus took Cilicia, and Ptolemy captured Cyprus.
Who saved Lysimachus in Phrygia?
Answer: Seleucus


Question: World War II holds a special place in the American psyche as the country's greatest triumph, and the U.S. military personnel of World War II are frequently referred to as "the Greatest Generation." Over 16 million served (about 11% of the population), and over 400,000 died during the war. The U.S. emerged as one of the two undisputed superpowers along with the Soviet Union, and unlike the Soviet Union, the U.S. homeland was virtually untouched by the ravages of war. During and following World War II, the United States and Britain developed an increasingly strong defense and intelligence relationship. Manifestations of this include extensive basing of U.S. forces in the UK, shared intelligence, shared military technology (e.g. nuclear technology), and shared procurement.
Is there an answer to this question: How many American service personnel died in World War II?

Answer: 400,000


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Carnival means weeks of events that bring colourfully decorated floats, contagiously throbbing music, luxuriously costumed groups of celebrants of all ages, King and Queen elections, electrifying jump-ups and torchlight parades, the Jouvert morning: the Children's Parades and finally the Grand Parade. Aruba's biggest celebration is a month-long affair consisting of festive "jump-ups" (street parades), spectacular parades and creative contests. Music and flamboyant costumes play a central role, from the Queen elections to the Grand Parade. Street parades continue in various districts throughout the month, with brass band, steel drum and roadmarch tunes. On the evening before Lent, Carnival ends with the symbolic burning of King Momo.
What type of costumes play a central role in the Queen elections?
A:
flamboyant