如何确定以下HTML标记的编码

Question

有没有办法找出以下meta说明的编码？

<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">

我如何（1）找出上述编码和（2）将其编码为UTF，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