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.

Example Input: 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?
Example Output: DC motors which directly use the DC or they may be 3-phase AC motors

Example Input: Passage: Under the 1963 constitution, Massamba-Débat was elected President for a five-year term. During Massamba-Débat's term in office the regime adopted "scientific socialism" as the country's constitutional ideology. In 1965, Congo established relations with the Soviet Union, the People's Republic of China, North Korea and North Vietnam. Massamba-Débat's regime also invited several hundred Cuban army troops into the country to train his party's militia units and these troops helped his government survive a coup in 1966 led by paratroopers loyal to future President Marien Ngouabi. Nevertheless, Massamba-Débat was unable to reconcile various institutional, tribal and ideological factions within the country and his regime ended abruptly with a bloodless coup d'état in September 1968. Question: When did Massamba-Debat lose power in the Congo?
Example Output: September 1968

Example Input: Passage: For years Burke pursued impeachment efforts against Warren Hastings, formerly Governor-General of Bengal, that resulted in the trial during 1786. His interaction with the British dominion of India began well before Hastings' impeachment trial. For two decades prior to the impeachment, Parliament had dealt with the Indian issue. This trial was the pinnacle of years of unrest and deliberation. In 1781 Burke was first able to delve into the issues surrounding the East India Company when he was appointed Chairman of the Commons Select Committee on East Indian Affairs—from that point until the end of the trial; India was Burke's primary concern. This committee was charged "to investigate alleged injustices in Bengal, the war with Hyder Ali, and other Indian difficulties". While Burke and the committee focused their attention on these matters, a second 'secret' committee was formed to assess the same issues. Both committee reports were written by Burke. Among other purposes, the reports conveyed to the Indian princes that Britain would not wage war on them, along with demanding that the HEIC recall Hastings. This was Burke's first call for substantive change regarding imperial practices. When addressing the whole House of Commons regarding the committee report, Burke described the Indian issue as one that "began 'in commerce' but 'ended in empire.'" Question: Where was Hastings formerly the governor?
Example Output:
Bengal