This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
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Question: Passage: Modern electrification systems take AC energy from a power grid which is delivered to a locomotive and converted to a DC voltage to be used by traction motors. These motors may either be DC motors which directly use the DC or they may be 3-phase AC motors which require further conversion of the DC to 3-phase AC (using power electronics). Thus both systems are faced with the same task: converting and transporting high-voltage AC from the power grid to low-voltage DC in the locomotive. Where should this conversion take place and at what voltage and current (AC or DC) should the power flow to the locomotive? And how does all this relate to energy-efficiency? Both the transmission and conversion of electric energy involve losses: ohmic losses in wires and power electronics, magnetic field losses in transformers and smoothing reactors (inductors). Power conversion for a DC system takes place mainly in a railway substation where large, heavy, and more efficient hardware can be used as compared to an AC system where conversion takes place aboard the locomotive where space is limited and losses are significantly higher. Also, the energy used to blow air to cool transformers, power electronics (including rectifiers), and other conversion hardware must be accounted for. Question: What nowdays electrification systems can use?

Answer: DC motors which directly use the DC or they may be 3-phase AC motors


Question: Passage: Bond travels to Austria to find White, who is dying of thallium poisoning. He admits to growing disenchanted with Quantum and tells Bond to find and protect his daughter, Dr. Madeline Swann, who will take him to L'Américain; this will in turn lead him to Spectre. White then commits suicide. Bond locates Swann at the Hoffler Klinik, but she is abducted by Hinx. Bond rescues her and the two meet Q, who discovers that Sciarra's ring links Oberhauser to Bond's previous missions, identifying Le Chiffre, Dominic Greene and Raoul Silva as Spectre agents. Swann reveals that L'Américain is a hotel in Tangier. Question: Where does JAmes find Dr. Swann?

Answer: Hoffler Klinik


Question: Passage: The creation–evolution controversy in the United States raises the issue of whether creationistic ideas may be legitimately called science and whether evolution itself may be legitimately called science. In the debate, both sides and even courts in their decisions have frequently invoked Popper's criterion of falsifiability (see Daubert standard). In this context, passages written by Popper are frequently quoted in which he speaks about such issues himself. For example, he famously stated "Darwinism is not a testable scientific theory, but a metaphysical research program—a possible framework for testable scientific theories." He continued: Question: Which of Popper's notions is often invoked in creation-evolution debates?

Answer:
criterion of falsifiability