{ "x": [ [ 1, 2, 3, 4 ], [ 2, 4, 6, 8 ] ], "x1": [ [ 5, 10, 19, 36 ], [ 5, 10, 15, 20 ] ], "y": [ [ 4, 8, 16, 32 ], [ 3, 6, 9, 12 ] ] }