Task: Error-Detect (source dataset: Spreadsheet-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:
| column1                                     |
|:--------------------------------------------|
| agenda zonder plaatjes                      |
| pen papermate blauw_ zwart_ rood (per stuk) |
| ballpoint_ maped                            |
| vulpen_ stoppoint                           |
| inktpatronen  bruynzeel (14x) stuk          |
| potlood_ papermate (per stuk)               |
| schrift_ alberts (per stuk)                 |
| bloknoot a4 bazic                           |
| bloknoot klein bazic                        |
| kladblok klein alberts + kangaroo           |
| kladblok groot                              |
| harde cahier met indeling (gekleurd)        |
| ringband stationary team                    |
| mapblaadjes  verona (100x) stuk             |
| scheidingsblaadjes  kangaroo (5x) stuk      |
| plastic map herlitz 2x stuk                 |
| insteekhoes herlitz 100x stuk               |
| snelhechters esselte (per stuk)             |
| snelhechters                                |
| kaftpapier 2x100x70                         |
| boeklont 25m sadipal                        |
| etui bazic                                  |
| gum bazic                                   |
| slijper (normaal) bruijnzeel                |
| slijper (figuur)                            |
| passer toppoint                             |
| schaar herlitz                              |
| geodriehoek herlitz                         |
| liniaal 16 cm (plastic)_ toppoint           |
| liniaal 30 cm (hout) herlitz                |
| tipp-ex toppoint 20 ml                      |
| tekenschrift  groot                         |
| tekenschrift  bruijnzeel                    |
| kleurpotloden (12x)_ brunzeel               |
| kleurpotloden (24x) bruijnzeel              |
| stiften (6x) stuk_ bruijnzeel               |
| stiften (12x)stuk_ bazic                    |
| stifthouder_ bruijnzeel                     |
| penceel_ toppoint 10xset                    |
| plakboek_ alberts                           |
| lijm (100 ml)_ collall                      |
| stickers                                    |
| calculator                                  |
| calculator scientific meranque              |
| woordenboek_ prisma eng-ned/sp-ned          |
| woordenboek_ van dale                       |
| schooltas                                   |
| samsonite                                   |