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:
| vluchtnr   |
|:-----------|
| cal7069    |
| cal8463    |
| cal8831    |
| cal9173    |
| cao8157    |
| cao9405    |
| cao9479    |
| cpa5051    |
| cpa5545    |
| cpa5585    |
| cpa5811    |
| cpa5917    |
| cpa6507    |
| cpa6533    |
| cpa9037    |
| cpa9865    |
| dhk5511    |
| dhk7289    |
| dhk8055    |
| dhk8319    |
| dhk9353    |
| dhk9835    |
| etd5765    |
| etd6453    |
| etd6773    |
| etd6827    |
| etd6901    |
| etd7341    |
| etd9085    |
| etd9363    |
| etd9671    |
| fdx5417    |
| fdx5529    |
| fdx7613    |
| fdx8941    |
| fdx9705    |
| fdx9949    |
| gec5063    |
| gec5691    |
| gec5749    |
| gec7571    |
| gec9139    |
| gec9857    |
| ira5751    |
| ira6267    |
| ira6965    |
| kal7403    |
| kal9081    |
| kal9659    |
| lco5015    |
| lco5451    |
| lco7775    |
| mas6275    |
| mas6971    |
| mas8277    |
| mas9123    |
| mas9149    |
| mas9959    |
| mph5006    |
| mph5174    |
| mph5216    |
| mph5312    |
| mph5442    |
| mph5946    |
| mph6536    |
| mph6568    |
| mph6794    |
| mph6914    |
| mph7048    |
| mph7078    |
| mph7252    |
| mph7656    |
| mph7672    |
| mph8140    |
| mph8422    |
| mph8736    |
| mph8798    |
| mph9262    |
| mph9296    |
| mph9418    |
| mph9602    |
| mph9852    |
| ns001      |
| qtr5831    |
| qtr7633    |
| qtr7853    |
| qtr8519    |
| qtr8709    |
| qtr9319    |
| sqc5021    |
| sqc5185    |
| sqc5737    |
| sqc6787    |
| sqc7065    |
| sqc8051    |
| sqc8211    |
| sqc8245    |
| sqc8379    |
| sqc8577    |
| sqc8617    |
| sqc8633    |
| sqc9003    |
| sqc9265    |
| sqc9341    |
| thy5343    |
| thy5659    |
| thy6909    |
| thy7075    |
| thy7755    |
| thy9603    |
| uae6619    |
| uae7395    |
| uae7631    |
| uae7833    |
| uae9521    |
| uae9693    |
| wf4141     |
| -1         |
| 9w2888     |
| 9w2889     |
| aa1260     |
| aa1261     |
| ac1020     |
| ac1021     |
| am3448     |
| am3449     |
| br1876     |
| br1877     |
| br5222     |
| br5223     |
| bw1404     |
| bw1405     |
| bw5460     |
| bw5461     |
| ci4166     |
| ci4167     |
| cx4216     |
| cx4217     |
| cz2066     |
| cz2067     |
| cz4522     |
| cz4523     |
| cz4838     |
| cz4839     |
| dl3114     |
| dl3115     |
| dl3952     |
| dl3953     |
| dl4990     |
| dl4991     |
| dl5230     |
| dl5231     |
| dl5828     |
| dl5829     |
| ek3556     |
| ek3557     |
| ey1774     |
| ey1775     |
| ga4942     |
| ga4943     |
| hv2675     |
| hv2676     |
| ir3140     |
| ir3141     |
| jl2410     |
| jl2411     |
| ke4450     |
| ke4451     |
| ly1734     |
| ly1735     |
| mu2604     |
| mu2605     |
| or2225     |
| or2226     |
| or2773     |
| or2774     |
| py3140     |
| py3141     |
| py3940     |
| py3941     |
| qr3062     |
| qr3063     |
| qr4438     |
| qr4439     |
| so1220     |
| so1221     |
| sq2992     |
| sq2993     |
| su1830     |
| su1831     |
| su1832     |
| su1833     |
| ts3112     |
| ts3113     |
| ts5596     |
| ts5597     |
| ts5870     |
| ts5871     |
| at2486     |
| at2487     |
| at2488     |
| at2489     |
| kl1317     |
| kl1318     |
| kl1319     |
| kl1320     |
| kl1453     |
| kl1454     |
| kl1467     |
| kl1468     |
| kl1613     |
| kl1614     |
| kl1811     |
| kl1812     |
| kl2055     |
| kl2056     |
| kl2087     |
| kl2088     |
| kl2213     |
| kl2214     |
| kl2215     |
| kl2216     |
| kl2333     |
| kl2334     |
| kl2413     |
| kl2414     |
| kl2623     |
| kl2624     |
| kl2697     |
| kl2698     |
| kl2761     |
| kl2762     |
| kl2889     |
| kl2890     |
| kl3057     |
| kl3058     |
| kl3123     |
| kl3124     |
| kl3223     |
| kl3224     |
| kl3385     |
| kl3386     |
| kl3597     |
| kl3598     |
| kl3609     |
| kl3610     |
| kl4293     |
| kl4294     |
| kl4377     |
| kl4378     |
| kl4647     |
| kl4648     |
| kl4905     |
| kl4906     |
| kl5011     |
| kl5012     |
| kl5303     |
| kl5304     |
| kl5415     |
| kl5416     |
| kl5427     |
| kl5428     |
| kl5715     |
| kl5716     |
| kq2032     |
| kq2033     |
| ms4126     |
| ms4127     |
| ms5882     |
| ms5883     |
| tu1080     |
| tu1081     |
| tu1082     |
| tu1083     |
| ua2362     |
| ua2363     |
| ua2888     |
| ua2889     |
| ua4102     |
| ua4103     |
| az206      |
| az207      |
| az208      |
| az209      |
| az494      |
| az495      |
| az496      |
| az497      |
| az576      |
| az577      |
| az578      |
| az579      |
| bt360      |
| bt361      |
| bt362      |
| bt363      |
| ei816      |
| ei817      |
| ei818      |
| ei819      |
| lo956      |
| lo957      |
| lo958      |
| lo959      |
| mt116      |
| mt117      |
| mt118      |
| mt119      |
| mt318      |
| mt319      |
| mt740      |
| mt741      |
| mt742      |
| mt743      |
| mt844      |
| mt845      |
| ok666      |
| ok667      |
| ok668      |
| ok669      |
| or141      |
| or142      |
| or143      |
| or144      |
| or353      |
| or354      |
| or355      |
| or356      |
| or649      |
| or650      |
| or651      |
| or652      |
| or717      |
| or718      |
| os896      |
| os897      |
| os898      |
| os899      |
| sk612      |
| sk613      |
| sk614      |
| sk615      |
| sk74       |
| sk75       |
| sk76       |
| sk77       |
| sk870      |
| sk871      |
| sk872      |
| sk873      |
| sr436      |
| sr437      |
| sr438      |
| sr439      |
| tk296      |
| tk297      |
| tk298      |
| tk299      |
| tk504      |
| tk505      |
| tk506      |
| tk507      |
| a3598      |
| a3599      |
| a3600      |
| a3601      |
| a3620      |
| a3621      |
| a3622      |
| a3623      |
| ay188      |
| ay189      |
| ay190      |
| ay191      |
| cai463     |
| cai464     |
| cai465     |
| cai466     |
| ew218      |
| ew219      |
| ew220      |
| ew221      |
| fb468      |
| fb469      |
| fb470      |
| fb471      |
| fr124      |
| fr125      |
| fr126      |
| fr127      |
| fr174      |
| fr175      |
| fr176      |
| fr177      |
| fr454      |
| fr455      |
| fr456      |
| fr457      |
| fr476      |
| fr477      |
| fr522      |
| fr523      |
| fr590      |
| fr591      |
| fr592      |
| fr593      |
| fr626      |
| fr627      |
| fr628      |
| fr629      |
| fr712      |
| fr713      |
| fr714      |
| fr715      |
| fr734      |
| fr735      |
| fr736      |
| fr737      |
| fr896      |
| fr897      |
| fr898      |
| fr899      |
| hv243      |
| hv244      |
| hv245      |
| hv246      |
| hv25       |
| hv26       |
| hv27       |
| hv273      |
| hv274      |
| hv28       |
| hv283      |
| hv284      |
| hv285      |
| hv286      |
| hv303      |
| hv304      |
| hv305      |
| hv306      |
| hv381      |
| hv382      |
| hv383      |
| hv384      |
| hv403      |
| hv404      |
| hv405      |
| hv406      |
| hv463      |
| hv464      |
| hv465      |
| hv466      |
| hv553      |
| hv554      |
| hv555      |
| hv556      |
| hv573      |
| hv574      |
| hv575      |
| hv576      |
| hv651      |
| hv652      |
| hv653      |
| hv654      |
| hv689      |
| hv690      |
| hv691      |
| hv692      |
| hv709      |
| hv710      |
| hv711      |
| hv712      |
| hv733      |
| hv734      |
| hv765      |
| hv766      |
| hv767      |
| hv768      |
| hv831      |
| hv832      |
| hv833      |
| hv834      |
| hv843      |
| hv844      |
| hv845      |
| hv846      |
| jp382      |
| jp383      |
| jp384      |
| jp385      |
| km410      |
| km411      |
| km412      |
| km413      |
| ou782      |
| ou783      |
| ou784      |
| ou785      |
| ps392      |
| ps393      |
| ps394      |
| ps395      |
| sn916      |
| sn917      |
| sn918      |
| sn919      |
| tp324      |
| tp325      |
| tp326      |
| tp327      |
| ux438      |
| ux439      |
| ux440      |
| ux441      |
| af396      |
| af397      |
| af398      |
| af399      |
| af478      |
| af479      |
| af480      |
| af481      |
| af890      |
| af891      |
| af892      |
| af893      |
| af92       |
| af93       |
| af94       |
| af95       |
| ba312      |
| ba313      |
| ba314      |
| ba315      |
| ba758      |
| ba759      |
| ba760      |
| ba761      |
| ba940      |
| ba941      |
| ba942      |
| ba943      |
| dy204      |
| dy205      |
| dy206      |
| dy207      |
| dy438      |
| dy439      |
| dy440      |
| dy441      |
| dy642      |
| dy643      |
| dy644      |
| dy645      |
| dy790      |
| dy791      |
| dy792      |
| dy793      |
| ei108      |
| ei109      |
| ei110      |
| ei111      |
| ezy210     |
| ezy211     |
| ezy212     |
| ezy213     |
| ezy236     |
| ezy237     |
| ezy238     |
| ezy239     |
| ezy324     |
| ezy325     |
| ezy326     |
| ezy327     |
| ezy460     |
| ezy461     |
| ezy462     |
| ezy463     |
| ezy632     |
| ezy633     |
| ezy634     |
| ezy635     |
| ezy684     |
| ezy685     |
| ezy686     |
| ezy687     |
| ezy696     |
| ezy697     |
| ezy698     |
| ezy699     |
| ezy726     |
| ezy727     |
| ezy728     |
| ezy729     |
| ezy740     |
| ezy741     |
| ezy742     |
| ezy743     |
| ezy822     |
| ezy823     |
| ezy824     |
| ezy825     |
| ezy830     |
| ezy831     |
| ezy832     |
| ezy833     |
| ezy916     |
| ezy917     |
| ezy944     |
| ezy945     |
| ezy946     |
| ezy947     |
| ib666      |
| ib667      |
| ib668      |
| ib669      |
| kl133      |
| kl134      |
| kl135      |
| kl136      |
| kl189      |
| kl190      |
| kl191      |
| kl192      |
| kl301      |
| kl302      |
| kl303      |
| kl304      |
| kl315      |
| kl316      |
| kl317      |
| kl318      |
| kl427      |
| kl428      |
| kl429      |
| kl430      |
| kl447      |
| kl448      |
| kl449      |
| kl450      |
| kl499      |
| kl500      |
| kl501      |
| kl502      |
| kl519      |
| kl520      |
| kl521      |
| kl522      |
| kl565      |
| kl566      |
| kl567      |
| kl568      |
| kl645      |
| kl646      |
| kl647      |
| kl648      |
| kl709      |
| kl710      |
| kl711      |
| kl712      |
| kl729      |
| kl730      |
| kl731      |
| kl732      |
| kl843      |
| kl844      |
| kl845      |
| kl846      |
| kl85       |
| kl859      |
| kl86       |
| kl860      |
| kl861      |
| kl862      |
| kl87       |
| kl88       |
| kl965      |
| kl966      |
| kl967      |
| kl968      |
| lh218      |
| lh219      |
| lh220      |
| lh221      |
| lh290      |
| lh291      |
| lh292      |
| lh293      |
| lh926      |
| lh927      |


label: -1