Problem: Cotton remained a key crop in the Southern economy after emancipation and the end of the Civil War in 1865. Across the South, sharecropping evolved, in which landless black and white farmers worked land owned by others in return for a share of the profits. Some farmers rented the land and bore the production costs themselves. Until mechanical cotton pickers were developed, cotton farmers needed additional labor to hand-pick cotton. Picking cotton was a source of income for families across the South. Rural and small town school systems had split vacations so children could work in the fields during "cotton-picking."
What was the procedure called which involved workers to work for a share of the profits?
The answer is the following: sharecropping

Beyonce's second solo album B'Day was released on September 5, 2006, in the US, to coincide with her twenty-fifth birthday. It sold 541,000 copies in its first week and debuted atop the Billboard 200, becoming Beyonce's second consecutive number-one album in the United States. The album's lead single "Deja Vu", featuring Jay Z, reached the top five on the Billboard Hot 100 chart. The second international single "Irreplaceable" was a commercial success worldwide, reaching number one in Australia, Hungary, Ireland, New Zealand and the United States. B'Day also produced three other singles; "Ring the Alarm", "Get Me Bodied", and "Green Light" (released in the United Kingdom only).
How many singles did her second album produce?
five

Input: Indigenous peoples of the Americas
The data indicate that the individual was from a population directly ancestral to present South American and Central American Native American populations, and closely related to present North American Native American populations. The implication is that there was an early divergence between North American and Central American plus South American populations. Hypotheses which posit that invasions subsequent to the Clovis culture overwhelmed or assimilated previous migrants into the Americas were ruled out.

Theories that there were invasions which overwhelmed or assimilated previous migrants into the Americas have been what?
Output: ruled out

Input: Article: In 1997, a year after the divorce, Diana was killed in a car crash in Paris. The Queen was on holiday with her extended family at Balmoral. Diana's two sons by CharlesPrinces William and Harrywanted to attend church and so the Queen and Prince Philip took them that morning. After that single public appearance, for five days the Queen and the Duke shielded their grandsons from the intense press interest by keeping them at Balmoral where they could grieve in private, but the royal family's seclusion and the failure to fly a flag at half-mast over Buckingham Palace caused public dismay. Pressured by the hostile reaction, the Queen agreed to return to London and do a live television broadcast on 5 September, the day before Diana's funeral. In the broadcast, she expressed admiration for Diana and her feelings "as a grandmother" for the two princes. As a result, much of the public hostility evaporated.

Now answer this question: What failure did the public find dismaying?

Output: fly a flag at half-mast

Article: Genetic engineering is the modification of an organism's genome through biotechnology. Since the 1970s, a variety of techniques have been developed to specifically add, remove and edit genes in an organism. Recently developed genome engineering techniques use engineered nuclease enzymes to create targeted DNA repair in a chromosome to either disrupt or edit a gene when the break is repaired. The related term synthetic biology is sometimes used to refer to extensive genetic engineering of an organism.

Question: What term refers to extensive genetic engineering of an organism?
Ans: synthetic biology

Input: Slavs
Slavic studies began as an almost exclusively linguistic and philological enterprise. As early as 1833, Slavic languages were recognized as Indo-European.

When were Slavic languages recognized as Indo-European?
Output:
As early as 1833