About 40,000,000 tons were produced in 1984[needs update]. It is obtained as the "heavy" (i.e., difficult to distill) fraction. Material with a boiling point greater than around 500 °C is considered asphalt. Vacuum distillation separates it from the other components in crude oil (such as naphtha, gasoline and diesel). The resulting material is typically further treated to extract small but valuable amounts of lubricants and to adjust the properties of the material to suit applications. In a de-asphalting unit, the crude asphalt is treated with either propane or butane in a supercritical phase to extract the lighter molecules, which are then separated. Further processing is possible by "blowing" the product: namely reacting it with oxygen. This step makes the product harder and more viscous.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What is material with a boiling point over 200 degrees Celsius considered?
Ah, so.. unanswerable

In 586 BCE King Nebuchadnezzar II of Babylon conquered Judah. According to the Hebrew Bible, he destroyed Solomon's Temple and exiled the Jews to Babylon. The defeat was also recorded by the Babylonians (see the Babylonian Chronicles). In 538 BCE, Cyrus the Great of Persia conquered Babylon and took over its empire. Cyrus issued a proclamation granting subjugated nations (including the people of Judah) religious freedom (for the original text, which corroborates the biblical narrative only in very broad terms, see the Cyrus Cylinder). According to the Hebrew Bible 50,000 Judeans, led by Zerubabel, returned to Judah and rebuilt the temple. A second group of 5,000, led by Ezra and Nehemiah, returned to Judah in 456 BCE although non-Jews wrote to Cyrus to try to prevent their return.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How many Judeans did Zerubabel return to Judah?
Ah, so.. 50,000

The formula defining the HDI is promulgated by the United Nations Development Programme (UNDP). In general, to transform a raw variable, say , into a unit-free index between 0 and 1 (which allows different indices to be added together), the following formula is used:
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What does UNDD stand for? 
Ah, so..
unanswerable