Task: Schema-Matching (source dataset: HXD)

Task: 
Please identify the matching columns between Table A and Table B. For each column in Table A, specify the corresponding column in Table B. If a column in A has no corresponding column in Table B, you can map it to null. Represent each column mapping using a pair of column headers in a list, i.e., [Table A Column, Table B column or null]. Provide the mapping for each column in Table A and return all mappings in a list.

No explanation and return the matching columns in a structured JSON format: {"column_mappings": <a list of column pairs>}.

TableA:
| ISO3   | Country      |   W1 |   W2 |   W3 |   W4 |   W5 |   W6 |   W7 |   W8 |   W9 |   W10 |   W11 |   W12 |   W13 |   W14 |   W15 |   W16 |   W17 |   W18 |   W19 |   W20 |   W21 |   W22 |   W23 |   W24 |   W25 |   W26 |   W27 |   W28 |   W29 |   W30 |   W31 |   W32 |   W33 |   W34 |   W35 |   W36 |   W37 |   W38 |   W39 |   W40 |   W41 |   W42 |   W43 |   W44 |   W45 |   W46 |   W47 |   W48 | W49   | W50   | W51   | W52   |
|:-------|:-------------|-----:|-----:|-----:|-----:|-----:|-----:|-----:|-----:|-----:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|------:|:------|:------|:------|:------|
| MLI    | Mali         |    0 |    0 |    0 |    0 |    0 |    0 |    0 |    0 |    0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     2 |    47 |     7 |     8 |    34 |    36 |     9 |    16 |     5 |     6 |    31 |    15 |     3 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 | 0     | 0     | 0     | 0     |
| COG    | Congo        |    9 |   15 |    3 |   34 |   38 |   59 |   75 |   59 |   40 |    77 |    53 |    82 |    79 |    74 |    81 |    46 |    37 |    48 |    34 |    59 |    40 |    36 |    17 |     6 |    13 |    11 |     9 |    11 |     2 |     6 |     2 |     6 |     2 |     2 |     3 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     6 |     8 | 14    | 30    | 11    | 14    |
| CAF    | RCA          |    0 |    0 |    0 |    0 |    0 |    0 |    0 |    0 |    0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 | 0     | 0     | 0     | 0     |
| SIL    | Sierra Leone |  214 |  199 |  216 |  215 |  145 |  141 |  234 |  467 |  277 |   197 |    98 |    63 |    28 |    41 |    60 |    46 |    32 |    37 |   111 |   102 |     9 |    47 |    76 |    21 |   103 |   102 |    75 |   288 |   806 |  1335 |  1713 |  2139 |  2024 |  2110 |  1911 |  1492 |  1282 |  1141 |   841 |   624 |   433 |   311 |   204 |   109 |    65 |    61 |    39 |    61 | **    | **    | **    | **    |
| NER    | Niger        |    3 |    0 |    2 |   15 |   65 |   46 |   35 |   17 |   64 |    77 |    47 |    15 |    32 |    24 |    58 |    29 |    55 |    68 |    64 |   126 |   212 |   126 |   163 |   274 |   393 |   356 |   308 |   241 |   107 |    89 |   176 |   134 |   120 |   165 |   195 |   363 |   212 |   169 |   122 |    64 |    57 |    67 |    88 |   120 |    54 |    42 |    21 |     3 | 2     | 0     | 0     | 0     |
| BEN    | Benin        |    1 |    0 |    0 |    1 |    0 |    0 |    0 |    0 |    0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     4 |    15 |    77 |    21 |    15 |     3 |     1 |     0 |     0 |     0 |     1 |     7 |     7 |    21 |    47 |    94 |    88 |    91 |    62 |    28 |    25 |     7 |     6 | 3     | 0     | 0     | 0     |
| SEN    | Senegal      |    0 |    0 |    0 |    0 |    0 |    0 |    0 |    0 |    0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 | 0     | 0     | 0     | 0     |
| GHA    | Ghana        |   14 |   18 |   15 |   23 |   16 |   12 |   13 |   23 |   15 |    15 |    27 |    69 |   289 |   624 |   566 |   558 |   508 |   292 |   147 |   296 |   157 |   253 |   199 |   145 |   224 |   129 |   176 |   153 |    90 |    59 |   102 |   104 |   118 |   121 |    48 |   231 |   700 |   439 |   354 |   344 |   316 |   235 |   230 |   215 |   196 |   128 |   144 |   135 | 132   | 82    | 43    | 6     |
| TCD    | Chad         |    0 |    0 |    0 |    0 |    0 |    0 |    0 |    0 |    0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 | 0     | 0     | 0     | 0     |
| LBR    | Liberia      |   36 |   20 |   26 |   19 |   23 |   23 |   29 |   16 |    0 |    12 |     2 |    13 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     6 |     2 |     0 |     0 |     0 |     0 |     0 |     4 |     8 |    13 |    10 |     6 | **    | 90    | 13    | 15    |

TableB:
| ISO3   | Country      |   Week1 |   Week2 |   Week3 |   Week4 |   Week5 |   Week6 |   Week7 |   Week8 |   Week9 |   Week10 |   Week11 |   Week12 |   Week13 |   Week14 |   Week15 |   Week16 |   Week17 |   Week18 |   Week19 |   Week20 |   Week21 |   Week22 |   Week23 |   Week24 |   Week25 |   Week26 |   Week27 |   Week28 |   Week29 |   Week30 |   Week31 |   Week32 |   Week33 |   Week34 |   Week35 |   Week36 |   Week37 |   Week38 |   Week39 |   Week40 |   Week41 |   Week42 |   Week43 |   Week44 |   Week45 |   Week46 |   Week47 |   Week48 |   Week49 |   Week50 |   Week51 |   Week52 |
|:-------|:-------------|--------:|--------:|--------:|--------:|--------:|--------:|--------:|--------:|--------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|---------:|
| COD    | DR Congo     |     874 |     692 |     529 |     612 |     569 |     624 |     656 |     701 |     918 |      753 |      647 |      712 |      503 |      364 |      310 |      392 |      332 |      373 |      466 |      448 |      665 |      492 |      527 |      624 |      535 |      585 |      811 |      936 |     1012 |     1107 |     1083 |     1209 |     1581 |     1670 |     1842 |     1620 |     2027 |     2219 |     2504 |     2251 |     1900 |     2033 |     1898 |     1999 |     1972 |     1469 |     1623 |     1395 |     1207 |     1049 |      820 |      888 |
| NGA    | Nigeria      |       0 |      24 |       1 |       7 |       5 |       0 |       1 |       0 |       7 |        1 |        0 |        1 |       20 |        0 |        7 |        1 |        0 |      258 |      290 |      290 |        2 |       77 |      126 |      108 |       82 |      186 |      109 |       36 |       80 |        2 |       23 |       92 |       22 |       91 |      604 |      992 |     1612 |      876 |      579 |      348 |      232 |      162 |      177 |       57 |       34 |       13 |       14 |       31 |      239 |      374 |      465 |      255 |
| BEN    | Benin        |       0 |       0 |       0 |       0 |       0 |       0 |       0 |       0 |       0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        1 |        0 |        0 |        2 |        0 |        0 |        1 |        0 |        0 |        6 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |
| CMR    | Cameroon     |       0 |       0 |       1 |       0 |       0 |       1 |       0 |      14 |       0 |        0 |        0 |        0 |        0 |        1 |        1 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        6 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        1 |        0 |        1 |        0 |        0 |        1 |        0 |        0 |        0 |        1 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |
| TCD    | Chad         |       0 |       0 |       0 |       0 |       0 |       0 |       0 |       0 |       0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |       84 |       55 |       39 |      120 |       90 |       63 |       31 |       71 |      171 |      236 |      152 |       58 |       52 |       18 |        6 |        2 |        0 |        0 |        0 |        0 |
| MLI    | Mali         |       0 |       0 |       0 |       0 |       0 |       0 |       0 |       0 |       0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |
| CAF    | RCA          |       0 |       0 |       0 |       0 |       0 |       0 |       0 |       0 |       0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |
| LBR    | Liberia      |       1 |       0 |       0 |       0 |       4 |       1 |       6 |       3 |       3 |        2 |        2 |        7 |        8 |        2 |        2 |       68 |        2 |        7 |        0 |        0 |        4 |        1 |        0 |        0 |        0 |        2 |        1 |        0 |        0 |        1 |        2 |        0 |        0 |        2 |        0 |        2 |        2 |        2 |        6 |        3 |        1 |        0 |        1 |        0 |        0 |        1 |        0 |        1 |        1 |        6 |        0 |        0 |
| TOG    | Togo         |       0 |       0 |       0 |       0 |       0 |       0 |       0 |       0 |       0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |
| SIL    | Sierra Leone |       0 |       0 |       0 |       1 |       0 |       1 |       0 |       0 |       0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        1 |        1 |        1 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        0 |        1 |        1 |        0 |        0 |        0 |        0 |        2 |        0 |        0 |        0 |        1 |        0 |        0 |        0 |        0 |        0 |        1 |        0 |        0 |        0 |        0 |        0 |        0 |



source_headers: ISO3
Country
W1
W2
W3
W4
W5
W6
W7
W8
W9
W10
W11
W12
W13
W14
W15
W16
W17
W18
W19
W20
W21
W22
W23
W24
W25
W26
W27
W28
W29
W30
W31
W32
W33
W34
W35
W36
W37
W38
W39
W40
W41
W42
W43
W44
W45
W46
W47
W48
W49
W50
W51
W52
target_headers: ISO3
Country
Week1
Week2
Week3
Week4
Week5
Week6
Week7
Week8
Week9
Week10
Week11
Week12
Week13
Week14
Week15
Week16
Week17
Week18
Week19
Week20
Week21
Week22
Week23
Week24
Week25
Week26
Week27
Week28
Week29
Week30
Week31
Week32
Week33
Week34
Week35
Week36
Week37
Week38
Week39
Week40
Week41
Week42
Week43
Week44
Week45
Week46
Week47
Week48
Week49
Week50
Week51
Week52
column_mappings: ISO3
ISO3
Country
Country
W1
Week1
W2
Week2
W3
Week3
W4
Week4
W5
Week5
W6
Week6
W7
Week7
W8
Week8
W9
Week9
W10
Week10
W11
Week11
W12
Week12
W13
Week13
W14
Week14
W15
Week15
W16
Week16
W17
Week17
W18
Week18
W19
Week19
W20
Week20
W21
Week21
W22
Week22
W23
Week23
W24
Week24
W25
Week25
W26
Week26
W27
Week27
W28
Week28
W29
Week29
W30
Week30
W31
Week31
W32
Week32
W33
Week33
W34
Week34
W35
Week35
W36
Week36
W37
Week37
W38
Week38
W39
Week39
W40
Week40
W41
Week41
W42
Week42
W43
Week43
W44
Week44
W45
Week45
W46
Week46
W47
Week47
W48
Week48
W49
Week49
W50
Week50
W51
Week51
W52
Week52
output: {"column_mappings": [["ISO3", "ISO3"], ["Country", "Country"], ["W1", "Week1"], ["W2", "Week2"], ["W3", "Week3"], ["W4", "Week4"], ["W5", "Week5"], ["W6", "Week6"], ["W7", "Week7"], ["W8", "Week8"], ["W9", "Week9"], ["W10", "Week10"], ["W11", "Week11"], ["W12", "Week12"], ["W13", "Week13"], ["W14", "Week14"], ["W15", "Week15"], ["W16", "Week16"], ["W17", "Week17"], ["W18", "Week18"], ["W19", "Week19"], ["W20", "Week20"], ["W21", "Week21"], ["W22", "Week22"], ["W23", "Week23"], ["W24", "Week24"], ["W25", "Week25"], ["W26", "Week26"], ["W27", "Week27"], ["W28", "Week28"], ["W29", "Week29"], ["W30", "Week30"], ["W31", "Week31"], ["W32", "Week32"], ["W33", "Week33"], ["W34", "Week34"], ["W35", "Week35"], ["W36", "Week36"], ["W37", "Week37"], ["W38", "Week38"], ["W39", "Week39"], ["W40", "Week40"], ["W41", "Week41"], ["W42", "Week42"], ["W43", "Week43"], ["W44", "Week44"], ["W45", "Week45"], ["W46", "Week46"], ["W47", "Week47"], ["W48", "Week48"], ["W49", "Week49"], ["W50", "Week50"], ["W51", "Week51"], ["W52", "Week52"]]}