I am trying to remove a certain block from my product page in Magento, but can't seem to find where I should delete it. I think it's somewhere in the XML files, but since I'm not that good of a web-developer, I figured it's stupid to just try to delete some files.

In the Magento admin I already disabled the 'tags' function (admin -> system -> configuration -> advanced -> disable Mage_Tag), but I can't find where to delete the entire block.

The block circled in red in the picture is the block I'm trying to delete. So also 'productomschrijving' and 'extra informatie'.