Removing duplicates

In my work I deal with large datasets of media coverage data where I want to remove duplicates. But what counts as a duplicate is only when an article with the same title appears on the same publication more than once - so in those two columns not just one column. If I use the remove duplicates button I'm worried it will remove data I need, i.e. rows which have the same title in different publications (which happens a lot). The trainer said there is a way to remove duplicates in this way but it's complicated.
For example:
Column A = title
Column B = Publication

How can I remove rows if both rows have the same value in column A and B?