The problem: Answer a question about this article:
On an international level the German DIN 4512 system has been effectively superseded in the 1980s by ISO 6:1974, ISO 2240:1982, and ISO 5800:1979 where the same sensitivity is written in linear and logarithmic form as "ISO 100/21" (now again with degree symbol). These ISO standards were subsequently adopted by DIN as well. Finally, the latest DIN 4512 revisions were replaced by corresponding ISO standards, DIN 4512-1:1993-05 by DIN ISO 6:1996-02 in September 2000, DIN 4512-4:1985-08 by DIN ISO 2240:1998-06 and DIN 4512-5:1990-11 by DIN ISO 5800:1998-06 both in July 2002.
When were the ISO standards first adopted?
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The answer: in the 1980s

The problem: Answer a question about this article:
On 16 April 1973, Gaddafi proclaimed the start of a "Popular Revolution" in a Zuwarah speech. He initiated this with a 5-point plan, the first point of which dissolved all existing laws, to be replaced by revolutionary enactments. The second point proclaimed that all opponents of the revolution had to be removed, while the third initiated an administrative revolution that Gaddafi proclaimed would remove all traces of bureaucracy and the bourgeoisie. The fourth point announced that the population must form People's Committees and be armed to defend the revolution, while the fifth proclaimed the beginning of a cultural revolution to expunge Libya of "poisonous" foreign influences. He began to lecture on this new phase of the revolution in Libya, Egypt, and France.
What happened to Libya's laws as a result of the first point of Gaddafi's speech?
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The answer: dissolved

The problem: Answer a question about this article:
Whitehall's disquiet at the failures of the RAF led to the replacement of Dowding (who was already due for retirement) with Sholto Douglas on 25 November. Douglas set about introducing more squadrons and dispersing the few GL sets to create a carpet effect in the southern counties. Still, in February 1941, there remained only seven squadrons with 87 pilots, under half the required strength. The GL carpet was supported by six GCI sets controlling radar-equipped night-fighters. By the height of the Blitz, they were becoming more successful. The number of contacts and combats rose in 1941, from 44 and two in 48 sorties in January 1941, to 204 and 74 in May (643 sorties). But even in May, 67% of the sorties were visual cat's-eye missions. Curiously, while 43% of the contacts in May 1941 were by visual sightings, they accounted for 61% of the combats. Yet when compared with Luftwaffe daylight operations, there was a sharp decline in German losses to 1%. If a vigilant bomber crew could spot the fighter first, they had a decent chance at evading it.
What did a bomber crew need to do for a good chance at evasion?
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The answer: spot the fighter first

The problem: Answer a question about this article:
Nevertheless, whether and to what degree any of these types of intermediaries have secondary liability is the subject of ongoing litigation. The decentralised structure of peer-to-peer networks, in particular, does not sit easily with existing laws on online intermediaries' liability. The BitTorrent protocol established an entirely decentralised network architecture in order to distribute large files effectively. Recent developments in peer-to-peer technology towards more complex network configurations are said to have been driven by a desire to avoid liability as intermediaries under existing laws.
What makes peer-to-peer networks different than other online providers?
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The answer:
decentralised structure