Problem: Liberia:

This influx was compounded by the decline of the Western Sudanic Mali Empire in 1375 and the Songhai Empire in 1591. Additionally, as inland regions underwent desertification, inhabitants moved to the wetter coast. These new inhabitants brought skills such as cotton spinning, cloth weaving, iron smelting, rice and sorghum cultivation, and social and political institutions from the Mali and Songhai empires. Shortly after the Mane conquered the region, the Vai people of the former Mali Empire immigrated into the Grand Cape Mount region. The ethnic Kru opposed the influx of Vai, forming an alliance with the Mane to stop further influx of Vai.[citation needed]

What happened when regions underwent desertification?
---
A: inhabitants moved to the wetter coast


Problem: The cloth or fiber material used, resin material, and the cloth to resin ratio determine the laminate's type designation (FR-4, CEM-1, G-10, etc.) and therefore the characteristics of the laminate produced. Important characteristics are the level to which the laminate is fire retardant, the dielectric constant (er), the loss factor (tδ), the tensile strength, the shear strength, the glass transition temperature (Tg), and the Z-axis expansion coefficient (how much the thickness changes with temperature).
What element of a laminate is designated by the cloth to resin ratio, among other things?
---
Answer: type designation


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
When World War II started, tonnage levels at the port decreased and shipping activities were suspended; however, the war did provide economic benefits for the city. Petrochemical refineries and manufacturing plants were constructed along the ship channel because of the demand for petroleum and synthetic rubber products by the defense industry during the war. Ellington Field, initially built during World War I, was revitalized as an advanced training center for bombardiers and navigators. The Brown Shipbuilding Company was founded in 1942 to build ships for the U.S. Navy during World War II. Due to the boom in defense jobs, thousands of new workers migrated to the city, both blacks and whites competing for the higher-paying jobs. President Roosevelt had established a policy of non-discrimination for defense contractors, and blacks gained some opportunities, especially in shipbuilding, although not without resistance from whites and increasing social tensions that erupted into occasional violence. Economic gains of blacks who entered defense industries continued in the postwar years.
Petrochemical refineries and manufacturing plants were built due to the demand for what items during the war?
A: petroleum and synthetic rubber products


Context and question: Madonna's emergence occurred during the advent of MTV; Chris Nelson from The New York Times spoke of pop artists like Madonna saying, "MTV, with its almost exclusively lip-synched videos, ushered in an era in which average music fans might happily spend hours a day, every day, watching singers just mouth the words." The symbiotic relationship between the music video and lip-syncing led to a desire for the spectacle and imagery of the music video to be transferred to live stage shows. He added, "Artists like Madonna and Janet Jackson set new standards for showmanship, with concerts that included not only elaborate costumes and precision-timed pyrotechnics but also highly athletic dancing. These effects came at the expense of live singing." Thor Christensen of The Dallas Morning News commented that while Madonna earned a reputation for lip-syncing during her 1990 Blond Ambition World Tour, she has subsequently reorganized her performances by "stay[ing] mostly still during her toughest singing parts and [leaves] the dance routines to her backup troupe ... [r]ather than try to croon and dance up a storm at the same time."
Who earned a reputation of lip synching in the Blond Ambition Tour?
Answer: Madonna


Question: The bells at the abbey were overhauled in 1971. The ring is now made up of ten bells, hung for change ringing, cast in 1971, by the Whitechapel Bell Foundry, tuned to the notes: F#, E, D, C#, B, A, G, F#, E and D. The Tenor bell in D (588.5 Hz) has a weight of 30 cwt, 1 qtr, 15 lb (3403 lb or 1544 kg).
Is there an answer to this question: When were the ine bells cast?

Answer: unanswerable


Question: The 2009 Human Rights Report by the United States Department of State noted that human rights in CAR were poor and expressed concerns over numerous government abuses. The U.S. State Department alleged that major human rights abuses such as extrajudicial executions by security forces, torture, beatings and rape of suspects and prisoners occurred with impunity. It also alleged harsh and life-threatening conditions in prisons and detention centers, arbitrary arrest, prolonged pretrial detention and denial of a fair trial, restrictions on freedom of movement, official corruption, and restrictions on workers' rights.
Is there an answer to this question: What actions did CAR mention that happened with impunity?

Answer:
unanswerable