Problem: In the beginning of 1996, several human rights groups brought cases to hold Shell accountable for alleged human rights violations in Nigeria, including summary execution, crimes against humanity, torture, inhumane treatment and arbitrary arrest and detention. In particular, Shell stood accused of collaborating in the execution of Ken Saro-Wiwa and eight other leaders of the Ogoni tribe of southern Nigeria, who were hanged in 1995 by Nigeria's then military rulers. The lawsuits were brought against Royal Dutch Shell and Brian Anderson, the head of its Nigerian operation. In 2009, Shell agreed to pay $15.5m in a legal settlement. Shell has not accepted any liability over the allegations against it.
In 1996, multiple groups filed lawsuits to hold Shell accountable for what?
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Answer: alleged human rights violations in Nigeria

Problem: Until the 1990s further replays would be played until one team was victorious. Some ties took as many as six matches to settle; in their 1975 campaign, Fulham played a total of 12 games over six rounds, which remains the most games played by a team to reach a final. Replays were traditionally played three or four days after the original game, but from 199192 they were staged at least 10 days later on police advice. This led to penalty shoot-outs being introduced, the first of which came on 26 November 1991 when Rotherham United eliminated Scunthorpe United.
When are replays played?
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Answer: . Replays were traditionally played three or four days after the original game, but from 199192 they were staged at least 10 days later on police advice.

Problem: Plants and various other groups of photosynthetic eukaryotes collectively known as "algae" have unique organelles known as chloroplasts. Chloroplasts are thought to be descended from cyanobacteria that formed endosymbiotic relationships with ancient plant and algal ancestors. Chloroplasts and cyanobacteria contain the blue-green pigment chlorophyll a. Chlorophyll a (as well as its plant and green algal-specific cousin chlorophyll b)[a] absorbs light in the blue-violet and orange/red parts of the spectrum while reflecting and transmitting the green light that we see as the characteristic colour of these organisms. The energy in the red and blue light that these pigments absorb is used by chloroplasts to make energy-rich carbon compounds from carbon dioxide and water by oxygenic photosynthesis, a process that generates molecular oxygen (O2) as a by-product.
From what ancient source are chloroplasts descended?
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Answer:
cyanobacteria