She was convinced that her son, the Prince of Wales, was responsible for Albert's death.

参考译文：她确信，他的儿子，（威尔士亲王/王子）对艾伯特死负有责任。

句子语法结构分析如下

主语:She(她）

谓语:was convinced(确信的;深信的;坚信的)

宾语从句 that her son, the Prince of Wales, was responsible for Albert's death( 备注：the Prince of Wales 为her son的同位语）

(1)convinced  adj. 确信的；深信的；有坚定信仰的

He was convinced that I was part of the problem.

他确信我就是问题的一部分。

He became convinced of the need for cheap editions of good quality writing.

他开始相信大众对优秀作品的普及本有需求。

I'm not convinced.

我还是不很信服。

He was a convinced Communist. 

他是个坚定的共产主义者。

(2)the Prince of Wales 威尔士亲王

(3)be responsible for 负有责任的;应承担责任的

He still felt responsible for her death.

他仍然觉得自己对她的死负有责任。