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By 1820, Charleston's population had grown to 23,000, maintaining its black (and mostly slave) majority. When a massive slave revolt planned by Denmark Vesey, a free black, was revealed in May 1822, whites reacted with intense fear, as they were well aware of the violent retribution of slaves against whites during the Haitian Revolution. Soon after, Vesey was tried and executed, hanged in early July with five slaves. Another 28 slaves were later hanged. Later, the state legislature passed laws requiring individual legislative approval for manumission (the freeing of a slave) and regulating activities of free blacks and slaves.
How many slaves were executed with Vesey?
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The answer: five slaves

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LEDs have also been used as a medium-quality voltage reference in electronic circuits. The forward voltage drop (e.g. about 1.7 V for a normal red LED) can be used instead of a Zener diode in low-voltage regulators. Red LEDs have the flattest I/V curve above the knee. Nitride-based LEDs have a fairly steep I/V curve and are useless for this purpose. Although LED forward voltage is far more current-dependent than a Zener diode, Zener diodes with breakdown voltages below 3 V are not widely available.
Zener diodes below what voltage are not widely available?
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The answer: 3 V

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Melbourne's rich and diverse literary history was recognised in 2008 when it became the second UNESCO City of Literature. The State Library of Victoria is one of Australia's oldest cultural institutions and one of many public and university libraries across the city. Melbourne also has Australia's widest range of bookstores, as well the nation's largest publishing sector. The city is home to significant writers' festivals, most notably the Melbourne Writers Festival. Several major literary prizes are open to local writers including the Melbourne Prize for Literature and the Victorian Premier's Literary Awards. Significant novels set in Melbourne include Fergus Hume's The Mystery of a Hansom Cab, Helen Garner's Monkey Grip and Christos Tsiolkas' The Slap. Notable writers and poets from Melbourne include Thomas Browne, C. J. Dennis, Germaine Greer and Peter Carey.
What do the novels The Mystery of a Hansom Cab, Monkey Grip, and The Slap have in common?
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The answer: set in Melbourne

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The slave trade was engaged in by European state and non-state actors such as Great Britain, the Netherlands, Portugal and private companies, as well as various African states and non-state actors. With rising anti-slavery sentiment at home and changing economic realities, Great Britain outlawed the international slave trade in 1807. Following the Napoleonic Wars, Great Britain established the West Africa Squadron in an attempt to halt the international traffic in slaves. It stopped ships of other nations that were leaving the African coast with slaves; the seized slaves were taken to Freetown, a colony in West Africa originally established for the resettlement of freed slaves from Britain. Britain intervened in the Lagos Kingship power struggle by bombarding Lagos in 1851, deposing the slave trade friendly Oba Kosoko, helping to install the amenable Oba Akitoye, and signing the Treaty between Great Britain and Lagos on 1 January 1852. Britain annexed Lagos as a Crown Colony in August 1861 with the Lagos Treaty of Cession. British missionaries expanded their operations and travelled further inland. In 1864, Samuel Ajayi Crowther became the first African bishop of the Anglican Church.
Where did Britain take slaves it seized from traders?
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The answer:
Freetown