如何确定以下HTML标记的编码

Question

有没有办法找出以下meta描述的编码

<meta content="Handyman John Garfield&amp;#39;s torrid affair with married Lana Turner leads to the murder of her husband and a tragic betrayal. MPAA Rating: NOTRATED  (c) 1946 A Warner Bros. Entertainment Inc. All Rights Reserved" itemprop="description">

我将如何（1）计算出上述代码的编码，以及（2）如何将其编码为UTF，因此其内容如下所示

Handyman John Garfield's torrid affair with married Lana Turner leads to the murder of her husband and a tragic betrayal. MPAA Rating: NOTRATED (c) 1946 A Warner Bros. Entertainment Inc. All Rights Reserved