context: At present, West Bengal is divided into 5 divisions and 25 districts. The departments are governed by the divisional commissioners and the districts are governed by the district administrator [7]. The capital of the state is located in Kolkata district. Other districts are divided into subdivisions and blocks. These are governed by the sub-divisional ruler and block development officer respectively. The panchayat system in this state is three-dimensional. Panchayat system at village level is known as "gram panchayat", [8] block level "panchayat samiti" [9] and district level "zila parishad" [10]. In the 20th century, the Burdwan district was divided into East Bardhaman district and West Bardhaman district. The other two districts announced earlier this year are Jhargram district and Kalimpong district.
question: How many districts are there in West Bengal?