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:
| Site   | Department   | Opening hours   | Monday       | Tuesday      | Wednesday    | Thursday     | Friday       | Saturday      | Sunday        |
|:-------|:-------------|:----------------|:-------------|:-------------|:-------------|:-------------|:-------------|:--------------|:--------------|
| RLI    | 0            | 0               | 0            | 0            | 0            | 0            | 0            | 0             | 0             |
|        |              | 1               | 0            | 0            | 0            | 0            | 0            | 0             | 0             |
|        | 1            | 0               | 0            | 0            | 0            | 0            | 0            | 0             | 0             |
|        |              | 1               | 0            | 0            | 0            | 0            | 0            | 0             | 0             |
|        | 2            | 0               | 0            | 0            | 0            | 0            | 0            | 0             | 0             |
|        |              | 1               | 0            | 0            | 0            | 0            | 0            | 0             | 0             |
|        | 3            | 0               | 1            | 1            | 1            | 1            | 1            | 1             | 1             |
|        |              | 1               | 2            | 2            | 2            | 2            | 2            | 2             | 2             |
|        | 4            | 0               | 8.30am-5pm   | 8.30am-5pm   | 8.30am-5pm   | 8.30am-5pm   | 8.30am-5pm   | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | 5            | 0               | 4            | 4            | 4            | 4            | 4            | 4             | 4             |
|        |              | 1               | 5            | 5            | 5            | 5            | 5            | 4             | 4             |
|        | 6            | 0               | 6            | 6            | 6            | 6            | 6            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | 7            | 0               | 6            | 6            | 6            | 6            | 6            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | 8            | 0               | 7            | 7            | 7            | 7            | 7            | 8am - 12 noon | 8am - 12 noon |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | 9            | 0               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
| FGH    | 0            | 0               | 0            | 0            | 0            | 0            | 0            | 0             | 0             |
|        |              | 1               | 0            | 0            | 0            | 0            | 0            | 0             | 0             |
|        | 1            | 0               | 0            | 0            | 0            | 0            | 0            | 0             | 0             |
|        |              | 1               | 0            | 0            | 0            | 0            | 0            | 0             | 0             |
|        | 2            | 0               | 0            | 0            | 0            | 0            | 0            | 0             | 0             |
|        |              | 1               | 0            | 0            | 0            | 0            | 0            | 0             | 0             |
|        | 3            | 0               | 1            | 1            | 1            | 1            | 1            | 1             | 1             |
|        |              | 1               | 2            | 2            | 2            | 2            | 2            | 2             | 2             |
|        | 4            | 0               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | 5            | 0               | 4            | 4            | 4            | 4            | 4            | 4             | 4             |
|        |              | 1               | 5            | 5            | 5            | 5            | 5            | 4             | 4             |
|        | 6            | 0               | 6            | 6            | 6            | 6            | 6            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | 7            | 0               | 6            | 6            | 6            | 6            | 6            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | 8            | 0               | 7            | 7            | 7            | 7            | 7            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | 9            | 0               | 8:30am - 5pm | 8:30am - 5pm | 8:30am - 5pm | 8:30am - 5pm | 8:30am - 5pm | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
| WGH    | 0            | 0               | 6            | 6            | 6            | 6            | 6            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | 1            | 0               | 6            | 6            | 6            | 6            | 6            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | 2            | 0               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | Blood Gas    | POCT            | 0            | 0            | 0            | 0            | 0            | 0             | 0             |
|        | 3            | 0               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | 4            | 0               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | 5            | 0               | 4            | 4            | 4            | 4            | 4            | 4             | 4             |
|        |              | 1               | 5            | 5            | 5            | 5            | 5            | 4             | 4             |
|        | 6            | 0               | 6            | 6            | 6            | 6            | 6            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | 7            | 0               | 6            | 6            | 6            | 6            | 6            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | 8            | 0               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        | 9            | 0               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |
|        |              | 1               | 3            | 3            | 3            | 3            | 3            | 3             | 3             |

## Output:


source: excel_file
label: operator: ffill
ffill_end_idx: 1
operator: stack
stack_start_idx: 3
stack_end_idx: 9
alternative_label: operator: stack
stack_start_idx: 3
stack_end_idx: 9
operator: ffill
ffill_end_idx: 1