Task: Error-Detect (source dataset: Relational-Tables)

Task: 
You are given a column of data from a table. Your job is to examine each value in the column, and identify if there is any clear data error in the column. An data error in the context of the column, can be values that are misspelled (typos), values that are formatted incorrectly, or values that are semantically incompatible with the rest of the column, etc., such that we can determine without ambiguity that such values are errors in the column. 

Since real-world data can vary widely in meaning and format, if you are uncertain whether a value is an error, please do not mark it as one. Only flag a value if you are confident that it is clearly a data error.

No explanation and return the final answer as a JSON object, {"obvious_error": "<CELL>"}. If you detect no error in the data, return {"obvious_error": null}.

Column:
| week_number   |
|:--------------|
| week 44       |
| week 45       |
| week 46       |
| week 47       |
| week 48       |
| week 49       |
| week 50       |
| week 51       |
| week 52       |
| week 53       |
| week 54       |
| week 55       |
| week 56       |
| week 57       |
| week 58       |
| week 59       |
| week 60       |
| week 61       |
| week 62       |
| week 63       |
| week 64       |
| week 65       |
| week 66       |
| week 67       |
| week 68       |
| week 69       |
| week 70       |
| week 71       |
| week 72       |
| week 73       |
| week 74       |
| week 75       |
| week 76       |
| week 77       |
| week 78       |
| week 79       |
| week 80       |
| week 81       |
| week 82       |
| week 83       |
| week 84       |
| week 85       |
| week 86       |
| week 87       |
| week 88       |
| week 89       |
| week 90       |
| week 91       |
| week 92       |
| week 93       |
| week 94       |
| week 95       |
| week 96       |
| week 97       |
| week 98       |
| week 99       |
| week 100      |
| week 101      |
| week 102      |
| week 103      |
| week 104      |
| week 105      |
| week 106      |
| week 107      |
| week 108      |
| week 109      |
| week 110      |
| week 111      |
| week 112      |
| week 113      |
| week 114      |
| week 115      |
| week 116      |
| week 117      |
| week 118      |
| week 119      |
| week 120      |
| week 121      |
| week 122      |
| week 123      |
| week 124      |
| week 125      |
| week 126      |
| week 127      |
| week 128      |
| week 129      |
| week 130      |
| week 131      |
| week 132      |
| week 133      |
| week 134      |
| week 135      |
| week 136      |
| week 137      |
| week 138      |
| week 139      |
| week 140      |
| week 141      |
| week 142      |
| week 143      |
| week 144      |
| week 145      |
| week 146      |
| week 147      |
| week 148      |
| week 149      |
| week 150      |
| week 151      |
| week 152      |
| week 153      |
| week 154      |
| week 155      |
| week 156      |
| week 157      |
| week 158      |
| week 159      |
| week 160      |
| week 161      |
| week 162      |
| week 163      |
| week 164      |
| week 165      |
| week 166      |
| week 167      |
| week 168      |
| week 169      |
| week 170      |
| week 171      |
| week 172      |
| week 173      |
| week 174      |
| week 175      |
| week 176      |
| week 177      |
| week 178      |
| week 179      |
| week 180      |
| week 181      |
| week 182      |
| week 183      |
| week 184      |
| week 185      |
| week 186      |
| week 187      |
| week 188      |
| week 189      |
| week 190      |
| week 191      |
| week 192      |
| week 193      |
| week 194      |
| week 195      |
| week 196      |
| week 197      |
| week 198      |
| week 199      |
| week 200      |
| week 1        |
| week 2        |
| week 3        |
| week 4        |
| week 5        |
| week 6        |
| week 7        |
| week 8        |
| week 9        |
| week 10       |
| week 11       |
| week 12       |
| week 13       |
| week 14       |
| week 15       |
| week 16       |
| week 17       |
| week 18       |
| week 19       |
| week 20       |
| week 21       |
| week 22       |
| week 23       |
| week 24       |
| week 25       |
| week 26       |
| week 27       |
| week 28       |
| week 29       |
| week 30       |
| week 31       |
| week 32       |
| week 33       |
| week 34       |
| week 35       |
| week 36       |
| week 37       |
| week 38       |
| week 39       |
| week 40       |
| week 41       |
| week 42       |
| week 43       |