Context and question: However loss resistance will generally affect the feedpoint impedance, adding to its resistive (real) component. That resistance will consist of the sum of the radiation resistance Rr and the loss resistance Rloss. If an rms current I is delivered to the terminals of an antenna, then a power of I2Rr will be radiated and a power of I2Rloss will be lost as heat. Therefore, the efficiency of an antenna is equal to Rr / (Rr + Rloss). Of course only the total resistance Rr + Rloss can be directly measured.
The addition of Rr and Rloss equals what?
Answer: resistance
Context and question: Greece was accused of trying to cover up the extent of its massive budget deficit in the wake of the global financial crisis. The allegation was prompted by the massive revision of the 2009 budget deficit forecast by the new PASOK government elected in October 2009, from "6–8%" (estimated by the previous New Democracy government) to 12.7% (later revised to 15.7%). However, the accuracy of the revised figures has also been questioned, and in February 2012 the Hellenic Parliament voted in favor of an official investigation following accusations by a former member of the Hellenic Statistical Authority that the deficit had been artificially inflated in order to justify harsher austerity measures.
What prompted the allegation of Greece's covering up its budget deficit? 
Answer: massive revision
Context and question: Just eight months into his presidency, the terrorist attacks of September 11, 2001 suddenly transformed Bush into a wartime president. Bush's approval ratings surged to near 90%. Within a month, the forces of a coalition led by the United States entered Afghanistan, which had been sheltering Osama bin Laden, suspected mastermind of the September 11 attacks. By December, the Taliban had been removed as rulers of Kabul, although a long and ongoing reconstruction would follow, severely hampered by ongoing turmoil and violence within the country.
What city had been ruled by Osama Bin Laden?
Answer:
unanswerable