Remove special characters from the text

This never happened before but ones again I’m searching for your help in solving very simple task.

I have a text parsed by Tika Parser URL input. The source is pdf file. The file itself is rather simple but there’re lists like:

• Advocate for change and work with the company to adopt • Partnered with a local domestic violence shelter to provide • Participated in an EMEA-wide Diversity Dialogue

new policies and services.

And like „ Reducing our environmental footprint. [the character isn’t printed, its a white square]

And sure, white question mark in diamonds.

I’d like to replace these special characters with something meaningful to process the document later with some formatting in html (make a question mark a paragraph, make lists with appropriate tags, etc.)

I was sure that I can easily achieve this with String manipulation node string replacer using Unicode of appropriate characters. It didn’t work.

They I tried regex replace in the same node - no luck.

I had many exciting results, like words without punctuation, text without page breaks, but these special characters I can’t catch.

Please help me - I really tried hard but failed…