问IBM关系提取“转发错误”(status_code 500)

EN

set_time_limit(0);

$curl = curl_init();
$post_args = array(
'txt' => $data,
'sid' => 'ie-en-news',
'rt' => 'json' 
);

curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, $post_args);
curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($curl, CURLOPT_URL, "https://gateway.watsonplatform.net/relationship-extraction-beta/api/v1/sire/0");
curl_setopt($curl, CURLOPT_USERPWD, "XXXXXXXXXXXXX:XXXXXXXXXXXXX");
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_CONNECTTIMEOUT ,0);
curl_setopt($curl, CURLOPT_TIMEOUT, 600); 

$result = curl_exec($curl);
curl_close($curl);

$decoded = json_decode($result, true);
echo "RESPONSE: [<Br/><pre>$result</pre><br/>]";