The problem: Answer a question about this article:
Viviparous mammals are in the subclass Theria; those living today are in the marsupial and placental infraclasses. A marsupial has a short gestation period, typically shorter than its estrous cycle, and gives birth to an undeveloped newborn that then undergoes further development; in many species, this takes place within a pouch-like sac, the marsupium, located in the front of the mother's abdomen. This is the plesyomorphic condition among viviparous mammals; the presence of epipubic bones in all non-placental mammals prevents the expansion of the torso needed for full pregnancy. Even non-placental eutherians probably reproduced this way.
What is present in all non-placental mammals?
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The answer: epipubic bones


The problem: Answer a question about this article:
The above explanation is merely a simple introduction to vacuum pumping, and is not representative of the entire range of pumps in use. Many variations of the positive displacement pump have been developed, and many other pump designs rely on fundamentally different principles. Momentum transfer pumps, which bear some similarities to dynamic pumps used at higher pressures, can achieve much higher quality vacuums than positive displacement pumps. Entrapment pumps can capture gases in a solid or absorbed state, often with no moving parts, no seals and no vibration. None of these pumps are universal; each type has important performance limitations. They all share a difficulty in pumping low molecular weight gases, especially hydrogen, helium, and neon.
What pump can capture gases in a solid or absorbed state?
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The answer: Entrapment pumps


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Shortness of breath occurs when the damage to the heart limits the output of the left ventricle, causing left ventricular failure and consequent pulmonary edema. Other symptoms include diaphoresis (an excessive form of sweating), weakness, light-headedness, nausea, vomiting, and palpitations. These symptoms are likely induced by a massive surge of catecholamines from the sympathetic nervous system, which occurs in response to pain and the blood flow abnormalities that result from dysfunction of the heart muscle. Loss of consciousness (due to inadequate blood flow to the brain and cardiogenic shock) and sudden death (frequently due to the development of ventricular fibrillation) can occur in MIs.
What does diaphoresis refer to?
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The answer: excessive form of sweating


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The first experimental radio license was issued in Philadelphia in August 1912 to St. Joseph's College. The first commercial broadcasting radio stations appeared in 1922: first WIP, then owned by Gimbel's department store, on March 17, followed the same year by WFIL, WOO, WCAU and WDAS. The highest-rated stations in Philadelphia include soft rock WBEB, KYW Newsradio, and urban adult contemporary WDAS-FM. Philadelphia is served by three major non-commercial public radio stations, WHYY-FM (NPR), WRTI (jazz, classical), and WXPN-FM (adult alternative music), as well as several smaller stations.
Name the 3 public radio stations?
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The answer:
WHYY-FM (NPR), WRTI (jazz, classical), and WXPN-FM