Data Details You will be working with four CSV files: train.csv – the training set containing id and label. test.csv – the test set containing only id (labels hidden). submission.csv – a sample submission file (id,label) in the correct format. solution.csv – hidden ground truth labels with Usage column (Public / Private) used for scoring. Example Submission id,label 1001,cs.CL 1002,math.CO 1003,physics.optics