Input: Read this: Cubist sculpture developed in parallel to Cubist painting. During the autumn of 1909 Picasso sculpted Head of a Woman (Fernande) with positive features depicted by negative space and vice versa. According to Douglas Cooper: "The first true Cubist sculpture was Picasso's impressive Woman's Head, modeled in 190910, a counterpart in three dimensions to many similar analytical and faceted heads in his paintings at the time." These positive/negative reversals were ambitiously exploited by Alexander Archipenko in 191213, for example in Woman Walking. Joseph Csaky, after Archipenko, was the first sculptor in Paris to join the Cubists, with whom he exhibited from 1911 onwards. They were followed by Raymond Duchamp-Villon and then in 1914 by Jacques Lipchitz, Henri Laurens and Ossip Zadkine.
Question: Who sculpted arm of a woman?

Output: unanswerable

QUES: On runways, green lights indicate the beginning of the runway for landing, while red lights indicate the end of the runway. Runway edge lighting consists of white lights spaced out on both sides of the runway, indicating the edge. Some airports have more complicated lighting on the runways including lights that run down the centerline of the runway and lights that help indicate the approach (an approach lighting system, or ALS). Low-traffic airports may use pilot controlled lighting to save electricity and staffing costs.

What does runway edge lighting indicate for landing?
What is the answer?
ANS: unanswerable

QUES: Jews originated as a national and religious group in the Middle East during the second millennium BCE, in the part of the Levant known as the Land of Israel. The Merneptah Stele appears to confirm the existence of a people of Israel, associated with the god El, somewhere in Canaan as far back as the 13th century BCE. The Israelites, as an outgrowth of the Canaanite population, consolidated their hold with the emergence of the Kingdom of Israel, and the Kingdom of Judah. Some consider that these Canaanite sedentary Israelites melded with incoming nomadic groups known as 'Hebrews'. Though few sources in the Bible mention the exilic periods in detail, the experience of diaspora life, from the Ancient Egyptian rule over the Levant, to Assyrian Captivity and Exile, to Babylonian Captivity and Exile, to Seleucid Imperial rule, to the Roman occupation, and the historical relations between Israelites and the homeland, became a major feature of Jewish history, identity and memory.
Which group originated as a national and religious group in the Middle East during the second millennium BCE, in the part of the Levant known as the Land of Israel?

ANS: Jews

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.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What other pump do entrapment pumps have similarities to?
Ah, so.. unanswerable

Question: Socially, while liberty and freedom of enterprise form the basis of its beliefs, elements of the party have wavered between what is termed "small-l liberalism" and social conservatism. Historically, Liberal Governments have been responsible for the carriage of a number of notable "socially liberal" reforms, including the opening of Australia to multiethnic immigration under Menzies and Harold Holt; Holt's 1967 Referendum on Aboriginal Rights; Sir John Gorton's support for cinema and the arts; selection of the first Aboriginal Senator, Neville Bonner, in 1971; and Malcolm Fraser's Aboriginal Land Rights Act 1976. A West Australian Liberal, Ken Wyatt, became the first Indigenous Australian elected to the House of Representatives in 2010.
Try to answer this question if possible: In what year was the first Aboriginal Senator elected?
Answer: 1971

Question: It is still possible for two sounds of indefinite pitch to clearly be higher or lower than one another. For instance, a snare drum sounds higher pitched than a bass drum though both have indefinite pitch, because its sound contains higher frequencies. In other words, it is possible and often easy to roughly discern the relative pitches of two sounds of indefinite pitch, but sounds of indefinite pitch do not neatly correspond to any specific pitch. A special type of pitch often occurs in free nature when sound reaches the ear of an observer directly from the source, and also after reflecting off a sound-reflecting surface. This phenomenon is called repetition pitch, because the addition of a true repetition of the original sound to itself is the basic prerequisite.
Try to answer this question if possible: Repetition pitch is caused by what phenomenon?
Answer:
the addition of a true repetition of the original sound