Cannot find specific text to edit in the bottom page

hello, when I enter into the admin site and try to edit the page “about”, I cannot find the text that is displayed in the sections “works” and “exhibits and awards”. I didn’t create the site myself and I cannot reach the person who made it.

It seems that this text is incapsulated somewhere else, but I cannot find any other element in the admin site containing the text I am looking for. any suggestion or any way to look for the text that I want to change (across all the elements of the site??)

thanks

The page I need help with: [log in to see the link]