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:
| city                |
|:--------------------|
| santa ana           |
| oakland             |
| san diego           |
| diamond bar         |
| la mesa             |
| irvine              |
| escondido           |
| santee              |
| ramona              |
| los angeles         |
| pasadena            |
| cerritos            |
| carlsbad            |
| las vegas_ nv       |
| milpitas            |
| berkeley            |
| encinitas           |
| goleta              |
| vista               |
| temecula            |
| chula vista         |
| ojai                |
| sacramento          |
| penryn              |
| national city       |
| corona              |
| san juan capistrano |
| hillsborough        |
| baldwin park        |
| signal hill         |
| poway               |
| costa mesa          |
| yorba linda         |
| tustin              |
| la jolla            |
| moorpark            |
| orange              |
| concord             |
| bakersfield         |
| valley village_ ca  |
| lake elsinore       |
| imperial            |
| long beach          |
| fountain valley     |
| citrus heights      |
| whittier            |
| anaheim             |
| paramount           |
| upland              |
| woodland hills      |
| west covina         |
| mission viejo       |
| san jose            |
| novato              |
| davis               |
| el segundo          |
| el cajon            |
| san clemente        |
| city of industry    |
| aguanga             |
| san marcos          |
| murrieta            |
| glendale            |
| san pedro           |
| manhattan beach     |
| fullerton           |
| brea                |
| fallbrook           |
| rancho cucamonga    |
| valley center       |
| folsom              |
| laguna beach        |
| pembroke            |
| riverside           |
| monrovia            |
| san rafael          |
| spring valley       |
| bonita              |
| huntington beach    |
| highland            |
| san marino          |
| santa ysabel        |
| laguna hills        |
| belmont             |
| arcadia             |
| la mirada           |
| monarch beach       |
| san francisco       |
| solana beach        |
| hemet               |
| northridge          |
| danville            |
| south pasadena      |
| gualala             |
| orinda              |
| bend_ or            |
| newport coast       |
| culver city         |
| silver spring_ md   |
| phoenix             |
| del mar             |
| buena park          |
| bonsall             |
| emeryville          |