Coincidentally with the start of First "pyatiletka" (5 year plan), a new commissariat of the Soviet Union was created, better known as "Narkomzem" (People's Commissariat of Land Cultivation) led by Yakov Yakovlev. After the speech on collectivization that Stalin gave to the Communist Academy, there were no specific instructions on how exactly it had to be implemented, except for liquidation of kulaks as a class. Stalin's revolution is often regarded as one of the factors which led to the severe Soviet famine of 1932–33, better known in Ukraine as the Holodomor. Official Soviet sources blamed the famine on counterrevolutionary efforts by the Kulaks, though there is little evidence for this claim. A plausible alternative explanation, supported by some historians, is that the famine occurred at least in part due to poor weather conditions and low harvests. The famine started in Ukraine in the winter of 1931 and despite the lack of any official reports the news spread by word of mouth rapidly. During that time restrictions on rail travel were set by authorities. Only next year in 1932-33 the famine spread outside of Ukraine to agricultural regions of Russia and Kazakhstan, while the "news blackout continued". The famine led to the introduction of the internal passport system, due to the unmanageable flow of migrants to the cities. The famine finally ended in 1933, after a successful harvest. Collectivization continued. During the second five-year plan Stalin came up with another famous slogan in 1935: "Life has become better, life has become more cheerful." Rationing was lifted. In 1936, due to a poor harvest, fears of another famine led to famously long breadlines. However, no such famine occurred, and these fears proved largely unfounded.