Link to dataset 1: https://archive.ics.uci.edu/ml/datasets/Sales_Transactions_Dataset_Weekly
Link to dataset 2: https://archive.ics.uci.edu/ml/datasets/Beijing+Multi-Site+Air-Quality+Data
Link to dataset 3: https://archive.ics.uci.edu/ml/datasets/ElectricityLoadDiagrams20112014