Get only first item value from items with listbox

[
{"caption":"Country List", "fields": [
    {"field":"city","caption":"City"},
    {"field":"country","caption":"Country","inputTV":"country"}
]}
]

[
{"header": "City", "width": "160", "sortable": "true", "dataIndex": "city"},
{"header": "Country", "width": "100", "sortable": "false", "dataIndex": "country"}
]

[[!getImageList?
    &tvname=`countryList`
    &tpl=`countryTpl`
    &docid=`[[+id]]`
  ]]

[[relatedArtistsEvent? &input=`[[*artists]]` &tpl=`eventRelatedArtistsTpl`]] 

<?php
if (empty($input)) { 

return 'This article is so unique, that we couldn\'t find anything related to it!'; 
}
$tpl = $modx->getOption('tpl',$scriptProperties,'relatedPagesTpl');
if ($modx->getChunk($tpl) == '') { 

return 'We found some related pages, but don\'t know how to present it.'; 
}
$ids = explode(',', $input);
$output = array();
foreach ($ids as $key => $value) {

$id=$modx->runSnippet("BabelTranslation",   array(
            "contextKey" => $modx->context->key, "resourceId" => $value)); 


  $resource = $modx->getObject('modResource',array(
    'published' => 1,
    'id' => $id));
  if ($resource instanceof modResource) {
    $output[] = $modx->getChunk($tpl,$resource->toArray());
  }
}
return implode('<br/> ',$output);

  <a href="[[~[[+id]]]]" title="[[+pagetitle]]">
    [[+longtitle:default=`[[+pagetitle]]`]]
    
  </a>
  <br/>

<p class="country">

[[!getImageList?
    &tvname=`countryList`
    &tpl=`countryTpl`
    &docid=`[[+id]]`
  ]]

</p>

$resource = $modx->getObject('modResource',$id);

$itemSeperator=',';
$seperator='<br>';
$output='';




if (!($resource instanceof modResource)) { return ''; }

$country_list=json_decode($resource->getTVValue('countryList'));

$lang=$modx->context->key;

 if($lang=='en'){

$_country_lang = array();
include $modx->getOption('core_path').'lexicon/country/en.inc.php';

}

if($lang=='web'){

$_country_lang = array();
include $modx->getOption('core_path').'lexicon/country/fr.inc.php';


}


 ///Iterating through countries
 foreach($country_list as $place) {

 $city=$place->city;
 $country_key=$place->country;
  
 $output.=$city;
 $output.=$itemSeperator;
 
 ///Getting the country by its key
 foreach ($_country_lang as $key =>$value) {

  
   if($key==$country_key){
       
         $output.=$value;

   }

}

$output.=$seperator;

}



return $output;

[[!getCountryList?
  &id=`[[+id]]`

]]