Task: Data-transform-reshape (source dataset: Auto-Tables)

Given a table, predict what python pandas transformation may be needed on the given input table. Valid choices for transformation include: {"stack", "wide_to_long", "transpose", "pivot", "explode", "ffill", "subtitles"}. Note that each of these is a common Python Pandas operator. Some transformations can have parameters. Each transformation and its parameters are describe as follows.
 
- stack: collapse homogeneous cols into rows.
@param (int): stack_start_idx: zero-based starting column index of the homogeneous column-group.
@param (int): stack_end_idx: zero-based ending column index of the homogeneous column-group.
 
- wide_to_long: collapse repeating col-groups into rows.
@param (int): wide_to_long_start_idx: zero-based starting column index of the repeating col-groups.
@param (int): wide_to_long_end_idx: zero-based ending column index of the repeating col-groups.
 
- transpose: convert rows to columns and vice versa.
 
- pivot: pivot repeating row-groups into cols.
@param (int): pivot_row_frequency: frequency of repeating row-groups.
 
- ffill: fill structurally empty cells in tables.
@param (int): ffill_end_idx: zero-based ending column index of the columns to be filled.
 
- explode: convert composite cells into atomic values
@param (int): explode_column_idx: zero-based column index of the column to be exploded.
 
- subtitle: convert table subtitles into a column.
 
OUTPUT the predicted transformation name along with its parameters for the given INPUT table in a JSON, e.g., {"transformation": "stack", "stack_start_idx": 1, "stack_end_idx": 5}. If the input table needs multi-step transformations (e.g, ffill followed by stack), list JSON of each transformation sequentially in a list, e.g., [{"transformation": "ffill", "ffill_end_idx": 1}, {"transformation": "stack", "stack_start_idx": 1, "stack_end_idx": 5}]. No explanation is needed.

## Input:
| DESCRIPTION   | DG1               | DG2                    | DG3               | DG4                    | DG5                    |
|:--------------|:------------------|:-----------------------|:------------------|:-----------------------|:-----------------------|
| TYPE          | CROMPTON GREAVES. | MARINE MOTOR-MEZ CZECH | CROMPTON GREAVES. | MARINE MOTOR-MEZ CZECH | MARINE MOTOR-MEZ CZECH |
| KH            | 2.2               | 1.5                    | 1.8               | 2.5                    | 3.2                    |
| Phase         | 3 ph              | 3 ph                   | 3 ph              | 3 ph                   | 3 ph                   |
| DUTY          | S1                | S1                     | S1                | S1                     | S2                     |
| RPM           | 2830              | 3000                   | 3200              | 3200                   | 3500                   |
| BRG DE        | 6200              | 6200                   | 6800              | 7000                   | 7200                   |
| SERIAL NO     | 2522 DVJ          | 1245 PA                | 5065 KA           | 1422 NB                | 1666 TS                |
| No of Motors  | 2                 | 2                      | 2                 | 2                      | 3                      |

## Output:


source: excel_file
label: transpose