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{"sheet":"Sheet1","index":0,"n_rows":2,"n_cols":3,"rows_kept":2,"cut":false,"hidden":false,"merged":[]}
["This is cell A1","This is cell B1","… and this is cell C1"]
["We are now on the second row at cell A2","B2","C2"]

{"sheet":"Sheet2","index":1,"n_rows":0,"n_cols":0,"rows_kept":0,"cut":false,"hidden":false,"merged":[]}

{"sheet":"Sheet3","index":2,"n_rows":0,"n_cols":0,"rows_kept":0,"cut":false,"hidden":false,"merged":[]}