Input: Article: DC commutating electric motors, if fitted with laminated pole pieces, become universal motors because they can also operate on AC; reversing the current in both stator and rotor does not reverse the motor. But the now-standard AC distribution frequencies of 50 and 60 Hz caused difficulties with inductive reactance and eddy current losses. Many railways chose low AC frequencies to overcome these problems. They must be converted from utility power by motor-generators or static inverters at the feeding substations or generated at dedicated traction powerstations.

Now answer this question: How can low frequencies be obtained?

Output: converted from utility power

Input: Article: The Liberal Party's organisation is dominated by the six state divisions, reflecting the party's original commitment to a federalised system of government (a commitment which was strongly maintained by all Liberal governments until 1983, but was to a large extent abandoned by the Howard Government, which showed strong centralising tendencies). Menzies deliberately created a weak national party machine and strong state divisions. Party policy is made almost entirely by the parliamentary parties, not by the party's rank-and-file members, although Liberal party members do have a degree of influence over party policy.

Now answer this question: Which politician purposely created strong state divisions to a weaker national party?

Output: Menzies

Input: Article: In a series of emergency meetings that lasted from 2–5 October, Chinese leaders debated whether to send Chinese troops into Korea. There was considerable resistance among many leaders, including senior military leaders, to confronting the U.S. in Korea. Mao strongly supported intervention, and Zhou was one of the few Chinese leaders who firmly supported him. After Lin Biao politely refused Mao's offer to command Chinese forces in Korea (citing his upcoming medical treatment), Mao decided that Peng Dehuai would be the commander of the Chinese forces in Korea after Peng agreed to support Mao's position. Mao then asked Peng to speak in favor of intervention to the rest of the Chinese leaders. After Peng made the case that if U.S. troops conquered Korea and reached the Yalu they might cross it and invade China the Politburo agreed to intervene in Korea. Later, the Chinese claimed that US bombers had violated PRC national airspace on three separate occasions and attacked Chinese targets before China intervened. On 8 October 1950, Mao Zedong redesignated the PLA North East Frontier Force as the Chinese People's Volunteer Army (PVA).

Now answer this question: What did Mao Zedong's reinvented PLA North East Frontier Force become?

Output:
People's Volunteer Army