Using SSML tags in WordPress

Hi All, I have integrated Polly into my WordPress blog and so far so good.

The only issue I have is that it reads everything and I’d like to leave out certain things like twitter embeds etc.

I’ve seen that you can insert SSML tags in to the content to do this but this is where I’m completely clueless. Am I inserting this into WordPress? If so, how and where?

Or is it something I need to do in the Polly Dashboard (where the file lives in the S3 bucket perhaps)?

Thanks in advance for any pointers.