sentences:  News of the 1905 Russian revolution, together with its revolutionary spirit, spread quickly into Russian-controlled Poland from Saint Petersburg, where demonstrators had been massacred on 22 January.Poland was a major center of revolutionary fighting in the Russian Empire in 1905–1907, and the Łódź insurrection was a key incident in those events.Workers in Łódź had already begun striking sometime before 22 January, and by 31 January the tsarist police were reporting demonstrators carrying placards with slogans such as "Down with the autocracy!