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:
| Unnamed: 0                                                  |
|:------------------------------------------------------------|
| nhs barking and dagenham ccg                                |
| nhs barnsley ccg                                            |
| nhs basildon and brentwood ccg                              |
| nhs bassetlaw ccg                                           |
| nhs bath and north east somerset, swindon and wiltshire ccg |
| nhs bedfordshire ccg                                        |
| nhs berkshire west ccg                                      |
| nhs birmingham and solihull ccg                             |
| nhs blackburn with darwen ccg                               |
| nhs blackpool ccg                                           |
| nhs bolton ccg                                              |
| nhs bradford district and craven ccg                        |
| nhs brent ccg                                               |
| nhs brighton and hove ccg                                   |
| nhs bristol, north somerset and south gloucestershire ccg   |
| nhs buckinghamshire ccg                                     |
| nhs bury ccg                                                |
| nhs calderdale ccg                                          |
| nhs cambridgeshire and peterborough ccg                     |
| nhs cannock chase ccg                                       |
| nhs castle point and rochford ccg                           |
| nhs central london (westminster) ccg                        |
| nhs cheshire ccg                                            |
| nhs chorley and south ribble ccg                            |
| nhs city and hackney ccg                                    |
| nhs county durham ccg                                       |
| nhs coventry and rugby ccg                                  |
| nhs derby and derbyshire ccg                                |
| nhs devon ccg                                               |
| nhs doncaster ccg                                           |
| nhs dorset ccg                                              |
| nhs dudley ccg                                              |
| nhs ealing ccg                                              |
| nhs east and north hertfordshire ccg                        |
| nhs east berkshire ccg                                      |
| nhs east lancashire ccg                                     |
| nhs east leicestershire and rutland ccg                     |
| nhs east riding of yorkshire ccg                            |
| nhs east staffordshire ccg                                  |
| nhs east sussex ccg                                         |
| nhs fareham and gosport ccg                                 |
| nhs fylde and wyre ccg                                      |
| nhs gloucestershire ccg                                     |
| nhs greater huddersfield ccg                                |
| nhs greater preston ccg                                     |
| nhs halton ccg                                              |
| nhs hammersmith and fulham ccg                              |
| nhs harrow ccg                                              |
| nhs havering ccg                                            |
| nhs herefordshire and worcestershire ccg                    |
| nhs herts valleys ccg                                       |
| nhs heywood, middleton and rochdale ccg                     |
| nhs hillingdon ccg                                          |
| nhs hounslow ccg                                            |
| nhs hull ccg                                                |
| nhs ipswich and east suffolk ccg                            |
| nhs isle of wight ccg                                       |
| nhs kent and medway ccg                                     |
| nhs kernow ccg                                              |
| nhs knowsley ccg                                            |
| nhs leeds ccg                                               |
| nhs leicester city ccg                                      |
| nhs lincolnshire ccg                                        |
| nhs liverpool ccg                                           |
| nhs luton ccg                                               |
| nhs manchester ccg                                          |
| nhs mid essex ccg                                           |
| nhs milton keynes ccg                                       |
| nhs morecambe bay ccg                                       |
| nhs newcastle gateshead ccg                                 |
| nhs newham ccg                                              |
| nhs norfolk and waveney ccg                                 |
| nhs north central london ccg                                |
| nhs north cumbria ccg                                       |
| nhs north east essex ccg                                    |
| nhs north east hampshire and farnham ccg                    |
| nhs north east lincolnshire ccg                             |
| nhs north hampshire ccg                                     |
| nhs north kirklees ccg                                      |
| nhs north lincolnshire ccg                                  |
| nhs north staffordshire ccg                                 |
| nhs north tyneside ccg                                      |
| nhs north yorkshire ccg                                     |
| nhs northamptonshire ccg                                    |
| nhs northumberland ccg                                      |
| nhs nottingham and nottinghamshire ccg                      |
| nhs oldham ccg                                              |
| nhs oxfordshire ccg                                         |
| nhs portsmouth ccg                                          |
| nhs redbridge ccg                                           |
| nhs rotherham ccg                                           |
| nhs salford ccg                                             |
| nhs sandwell and west birmingham ccg                        |
| nhs sheffield ccg                                           |
| nhs shropshire ccg                                          |
| nhs somerset ccg                                            |
| nhs south east london ccg                                   |
| nhs south east staffordshire and seisdon peninsula ccg      |
| nhs south eastern hampshire ccg                             |
| nhs south sefton ccg                                        |
| nhs south tyneside ccg                                      |
| nhs south warwickshire ccg                                  |
| nhs south west london ccg                                   |
| nhs southampton ccg                                         |
| nhs southend ccg                                            |
| nhs southport and formby ccg                                |
| nhs st helens ccg                                           |
| nhs stafford and surrounds ccg                              |
| nhs stockport ccg                                           |
| nhs stoke on trent ccg                                      |
| nhs sunderland ccg                                          |
| nhs surrey heartlands ccg                                   |
| nhs surrey heath ccg                                        |
| nhs tameside and glossop ccg                                |
| nhs tees valley ccg                                         |
| nhs telford and wrekin ccg                                  |
| nhs thurrock ccg                                            |
| nhs tower hamlets ccg                                       |
| nhs trafford ccg                                            |
| nhs vale of york ccg                                        |
| nhs wakefield ccg                                           |
| nhs walsall ccg                                             |
| nhs waltham forest ccg                                      |
| nhs warrington ccg                                          |
| nhs warwickshire north ccg                                  |
| nhs west essex ccg                                          |
| nhs west hampshire ccg                                      |
| nhs west lancashire ccg                                     |
| nhs west leicestershire ccg                                 |
| nhs west london ccg                                         |
| nhs west suffolk ccg                                        |
| nhs west sussex ccg                                         |
| nhs wigan borough ccg                                       |
| nhs wirral ccg                                              |