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:
| competition_name                                       |
|:-------------------------------------------------------|
| world table tennis championships                       |
| ittf world tour_ belgium open (challenge)              |
| world team table tennis championships                  |
| ittf world tour swedish open (major)                   |
| ittf world tour german open (super)                    |
| ittf world tour hungarian open (major)                 |
| 20th commonwealth championships                        |
| ittf world tour laox japan open (super)                |
| ittf world tour korea open (super)                     |
| ittf world tour - asarel bulgaria open (major)         |
| ittf world tour czech open (major)                     |
| ittf world tour polish open (major)                    |
| ittf world tour premier lotto nigeria open (challenge) |
| finlandia open                                         |
| ittf world tour kuwait open (super)                    |
| ittf world tour zagreb (croatia) open (challenge)      |
| ittf world tour qatar open (super)                     |
| ittf world tour_ argentina open (challenge)            |
| ittf world tour_ chile open (challenge)                |
| south american championships                           |
| ittf world tour chile open (challenge)                 |
| ittf world tour_ austrian open (major)                 |
| ittf world tour_ polish open (major)                   |
| central-american championships                         |
| men´s world cup                                        |
| ittf world tour australian open (challenge)            |
| ittf world tour slovenia open (challenge)              |
| ittf world tour grand finals                           |
| swiss open                                             |
| women´s world cup                                      |
| north european championships                           |
| ittf world tour pyongyang open (challenge)             |
| 11th african games                                     |
| ittf-africa top 16 cup                                 |
| ittf asian championships                               |
| ittf-latin american championships                      |
| ittf european table tennis championships               |
| ittf north american championships                      |
| ittf europe top 16                                     |
| ittf nakheel asian cup                                 |
| ittf latin american cup                                |
| ittf north america cup                                 |
| ittf oceania cup                                       |
| olympic games                                          |