OpenCalais无法查看重要性值

Question

我正在使用PHP-OpenCalais库从文本片段中提取数据。实体的var_dump给出如下内容：

Array
    (
        [IndustryTerm] => Array
            (
                [0] => Internet
                [1] => software maker
                [2] => Internet search
            )
        [Person] => Array
            (
                [0] => Steve Ballmer
                [1] => Jerry Yang
                [2] => Colin Gillis
            )
        [Company] => Array
            (
                [0] => Google Inc.
                [1] => Canaccord Adams
                [2] => Yahoo!
                [3] => Microsoft Corp.
            )
        [Currency] => Array
            (
                [0] => USD
            )
        [SocialTag] => Array
            (
                [0] => New encyclopedism
                [1] => Microsoft
                [2] => Jerry Yang
                [3] => Steve Ballmer
                [4] => Bing
                [5] => Yahoo!
                [6] => Internet search engines
                [7] => Hypertext
            )
    )

但是，这缺少了很多信息，例如，socialTag元素没有重要值，因为它在JSON响应中返回：

我认为来自opencalais.php类的这些代码行中的问题我用来解析JSON响应（这些是第71-76行）：

foreach ($object as $item) {
        if (!empty($item->_typeGroup) && !empty($item->name)) {
            $this->entities[$item->_typeGroup][] = trim($item->name);
        }
    }