Task: Formula-prediction-context (source dataset: cisco-random)

You are given an table region extracted from a real Excel spreadsheet, which is centered around a cell called "Target Cell" (labeled as "[Target Cell]" shown in the table below). The table region below includes up to 10 rows above/below the Target Cell, and 10 columns to the left/right of the Target Cell. 

Your task is to analyze the table context surrounding the Target Cell, and predict the most likely Excel formula that should go in the Target Cell. If multiple formulas are possible, choose the most reasonable or commonly used based on context.

1. Please follow the standard formula syntax in Excel, e.g. always begins with an equal sign (=).
2. Base your predicted formula on the surrounding table context, e.g., column headers, annotations, and data values in nearby cells.
3. No explanation — just output the formula itself in a JSON format: {"formula": "your_formula_here"}.

Input Excel Snippet in Markdown format:
|    | T                   | U                   | V                   | W                   | X                   | Y                   | Z                   | AA                  | AB                  | AC                  | AD            | AE                  | AF                  | AG                  | AH                  | AI                  | AJ                  | AK                  | AL                  | AM                  | AN                  |
|---:|:--------------------|:--------------------|:--------------------|:--------------------|:--------------------|:--------------------|:--------------------|:--------------------|:--------------------|:--------------------|:--------------|:--------------------|:--------------------|:--------------------|:--------------------|:--------------------|:--------------------|:--------------------|:--------------------|:--------------------|:--------------------|
|  1 |                     |                     |                     |                     |                     |                     |                     |                     |                     |                     |               |                     |                     |                     |                     |                     |                     |                     |                     |                     |                     |
|  2 |                     |                     |                     |                     |                     |                     | September           |                     |                     |                     |               |                     |                     |                     |                     |                     |                     |                     |                     |                     |                     |
|  3 | T                   | W                   | T                   | F                   | M                   | T                   | W                   | T                   | F                   | M                   | T             | W                   | T                   | F                   | M                   | T                   | W                   | T                   | F                   | M                   | T                   |
|  4 | 1900-01-24 00:00:00 | 1900-01-25 00:00:00 | 1900-01-26 00:00:00 | 1900-01-27 00:00:00 | 1900-01-30 00:00:00 | 1900-01-31 00:00:00 | 1900-02-01 00:00:00 | 1900-02-02 00:00:00 | 1900-02-03 00:00:00 | 1900-02-06 00:00:00 | [Target Cell] | 1900-02-08 00:00:00 | 1900-02-09 00:00:00 | 1900-02-10 00:00:00 | 1900-02-13 00:00:00 | 1900-02-14 00:00:00 | 1900-02-15 00:00:00 | 1900-02-16 00:00:00 | 1900-02-17 00:00:00 | 1900-02-20 00:00:00 | 1900-02-21 00:00:00 |
|  5 |                     |                     |                     |                     |                     |                     |                     |                     |                     |                     |               |                     |                     |                     |                     |                     |                     |                     |                     |                     |                     |
|  6 |                     |                     |                     |                     |                     |                     |                     |                     |                     |                     |               |                     |                     |                     |                     |                     |                     |                     |                     |                     |                     |
|  7 |                     |                     |                     |                     |                     |                     |                     |                     |                     |                     |               |                     |                     |                     |                     |                     |                     |                     |                     |                     |                     |
|  8 |                     |                     | 1                   |                     |                     | 1                   |                     | 1                   |                     |                     | 1             |                     | 1                   |                     |                     | 1                   |                     |                     |                     |                     | 1                   |
|  9 |                     |                     | 2                   |                     |                     | 2                   |                     |                     |                     |                     | 2             |                     |                     |                     |                     | 2                   |                     |                     |                     |                     |                     |
| 10 |                     |                     | 3                   |                     |                     | 8                   |                     |                     |                     |                     | 3             |                     |                     |                     |                     | 8                   |                     |                     |                     |                     |                     |
| 11 | 4                   |                     | 5                   |                     |                     |                     |                     |                     |                     |                     | 4             |                     | 5                   |                     |                     | 5                   |                     |                     |                     |                     | 4                   |
| 12 | 6                   |                     | 7                   |                     |                     |                     |                     |                     |                     |                     | 6             |                     | 7                   |                     |                     | 7                   |                     |                     |                     |                     | 6                   |
| 13 |                     |                     |                     |                     |                     |                     |                     |                     |                     |                     |               |                     |                     |                     |                     |                     |                     |                     |                     |                     |                     |
| 14 |                     |                     |                     |                     |                     |                     |                     |                     |                     |                     |               |                     |                     |                     |                     |                     |                     |                     |                     |                     |                     |



min_row: 1
max_row: 14
min_col: 20
max_col: 40
target_cell_row_idx: 4
target_cell_col_idx: 30
target_cell_value: 1900-02-07 00:00:00
formula: =AC4+1