This task involves creating answers to complex questions, from a given passage. Answering these questions, typically involve understanding multiple sentences. Make sure that your answer has the same type as the "answer type" mentioned in input. The provided "answer type" can be of any of the following types: "span", "date", "number". A "span" answer is a continuous phrase taken directly from the passage or question. You can directly copy-paste the text from the passage or the question for span type answers. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words. A "number" type answer can include a digit specifying an actual value. For "date" type answers, use DD MM YYYY format e.g. 11 Jan 1992. If full date is not available in the passage you can write partial date such as 1992 or Jan 1992. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words.

Passage: The rebellion included the areas of Toplica, Jablanica, Jastrebac, eastern and central parts of Kopaonik. The rebels liberated Kursumlija , Lebane , Prokuplje and Blace . Having broke out in the Toplica region, the rebellion expanded into territories on the right bank of the West Morava , and in the West Morava valley, included the Sokobanja and Svrljig areas. On March 12, the Bulgarian counter-attack started under the command of Alexander Protogerov involving IMRO forces led by Tane Nikolov. Bulgarian and Austro-Hungarian authorities worked together. IMRO commander and Bulgarian officer Todor Aleksandrov orchestrated the most violent actions committed by Bulgarian paramilitary. After several days of fighting, the Bulgarians entered Prokuplje on 14 March and the Austro-Hungarians entered Kursumlija on 16 March. As of 25 March, the order there was fully restored. In the battles, several thousand people were killed, including civilians. In April 1917, Pecanac with his guerrillas, attacked a railway station. On May 15, Pecanac entered the old Bulgarian border and invaded Bosilegrad, which was burned. Then his band withdrew to Kosovo, controlled then by the Austro-Hungarians. The Allies opened a new front at Salonika in June but the Serbian Army was unable to break through the Bulgarian lines. After reemerging again for a short time, in September - October 1917 Pecanac again disappeared. In October 1917 the Austro-Hungarian command created entirely Albanian paramilitary detachments to capture the rest of the Serbian rebels into the mountains and in December 1917, Kosta Vojinovic was killed.
Question: How many places did the rebels liberate?
Answer type: Number
4.