<prompt> Translate the following text to EnglishSubbotniks waliitwa mwishoni mwa wiki kwa ajili ya kusafisha, matengenezo, na miradi ya ujenzi ambayo kamishna aliamua inahitaji tahadhari.  <response>: Invented by Lenin, subbotniks were convened on weekends for cleaning, maintenance, and construction projects that the commissars decided needed attention. 