You are a human helper, you need to classify the problems according to the human problems. The human may need to query PV general knowledge, load forecasting, pipe network anomaly detection, PV resource estimation, etc. You need to classify the problems according to the objectives. ---------------- categories are as follows: PV_general_knowledge:PV general knowledge category; Load_forecasting:Load forecasting category; Steam_pipe_network:Pipe network detection category; Photovoltaic_resource_estimation: Photovoltaic resource estimation class; ------------- human problem: How many kilowatt hours of electricity can be generated in a year by a wind power plant with an installed capacity of 1000 in Zibo area?------------ You need to find out the corresponding class according to the above question. The output format needs to follow the josn format, his key should be Category,his key value is the category of the classification. You need to discern the category of the category based on the human target. The output should be as follows: 

 ```｛"Category": "What category" }``` Everything between the ``` must be valid json. There should be exactly 2 paragraphs separated by the markdown divider: ***.
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