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:
|   Unnamed: 0 | January               | October         | November          | December            | February          | March            | April             | May                | June               | July              | August                | September         |
|-------------:|:----------------------|:----------------|:------------------|:--------------------|:------------------|:-----------------|:------------------|:-------------------|:-------------------|:------------------|:----------------------|:------------------|
|         2010 | Jaime Faith Edmondson | Claire Sinclair | Shera Bechard     | Ashley Hobbs        | Heather Rae Young | Kyra Milan       | Amy Leigh Andrews | Kassie Lyn Logsdon | Katie Vernola      | Shanna McLaughlin | Francesca Frigo       | Olivia Paige      |
|         2011 | Anna Sophia Berglund  | Amanda Cerny    | Ciara Price       | Rainy Day Jordan    | Kylie Johnson     | Ashley Mattingly | Jaclyn Swedberg   | Sasha Bonilova     | Mei-Ling Lam       | Jessa Lynn Hinton | Iryna Ivanova         | Tiffany Toth      |
|         2012 | Heather Knox          | Pamela Horton   | Britany Nola      | Amanda Streich      | Leola Bell        | Lisa Seiffert    | Raquel Pomplun    | Nikki Leigh        | Amelia Talon       | Shelby Chesnes    | Beth Williams         | Alana Campos      |
|         2013 | Karina Marie          | Carly Lauren    | Gemma Lee Farrell | Kennedy Summers     | Shawn Dillon      | Ashley Doris     | Jaslyn Ome        | Kristen Nicole     | Audrey Aleen Allen | Alyssa Arcè       | Val Keil              | Bryiana Noelle    |
|         2014 | Roos van Montfort     | Roxanna June    | Gia Marie         | Elizabeth Ostrander | Amanda Booth      | Britt Linn       | Shanice Jordyn    | Dani Mathers       | Jessica Ashley     | Emily Agnes       | Maggie May            | Stephanie Branton |
|         2015 | Brittny Ward          | Ana Cheri       | Rachel Harris     | Eugena Washington   | Kayslee Collins   | Chelsie Aryn     | Alexandra Tyler   | Brittany Brousseau | Kaylia Cassandra   | Kayla Rae Reid    | Dominique Jane        | Monica Sims       |
|         2016 | Amberleigh West       | Allie Silva     | Ashley Smith      | Enikő Mihalik       | Kristy Garett     | Dree Hemingway   | Camille Rowe      | Brook Power        | Josie Canseco      | Ali Michael       | Valerie van der Graaf | Kelly Gale        |
|         2017 | Bridget Malcolm       |                 |                   |                     | Joy Corrigan      | Elizabeth Elam   | Nina Daniele      | Lada Kravchenko    | Elsie Hewitt       | Dana Taylor       |                       |                   |

## Output:


source: web
label: operator: stack
stack_start_idx: 1
stack_end_idx: 12
alternative_label: operator: transpose
operator: stack
stack_start_idx: 1
stack_end_idx: 8