Problem: An additional 4.6 billion tonnes of uranium are estimated to be in sea water (Japanese scientists in the 1980s showed that extraction of uranium from sea water using ion exchangers was technically feasible). There have been experiments to extract uranium from sea water, but the yield has been low due to the carbonate present in the water. In 2012, ORNL researchers announced the successful development of a new absorbent material dubbed HiCap which performs surface retention of solid or gas molecules, atoms or ions and also effectively removes toxic metals from water, according to results verified by researchers at Pacific Northwest National Laboratory.
About how many tonnes of uranium is theorized to be absent in the sea?
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Answer: unanswerable


Problem: In 2006, Dell acknowledged that it had problems with customer service. Issues included call transfers of more than 45% of calls and long wait times. Dell's blog detailed the response: "We're spending more than a $100 million — and a lot of blood, sweat and tears of talented people — to fix this." Later in the year, the company increased its spending on customer service to $150 million. Despite significant investment in this space, Dell continues to face public scrutiny with even the company's own website littered with complaints regarding the issue escalation process.[original research?]
What percentage of IBM support calls were transferred?
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Answer: unanswerable


Problem: Possibly in part due to expedited federal habeas corpus procedures embodied in the Antiterrorism and Effective Death Penalty Act of 1996, the pace of executions picked up, reaching a peak of 98 in 1999 and then they declined gradually to 28 in 2015. Since the death penalty was reauthorized in 1976, 1,411 people have been executed, almost exclusively by the states, with most occurring after 1990. Texas has accounted for over one-third of modern executions (although only two death sentences were imposed in Texas during 2015, with the courts preferring to issue sentences of life without parole instead) and over four times as many as Oklahoma, the state with the second-highest number. California has the greatest number of prisoners on death row, has issued the highest number of death sentences but has held relatively few executions.
Which state has the largest number of people awaiting execution?
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Answer:
California