Controling ad display by taxonomy term(s)

Hi, I'm a relative newbie to Drupal, but have succeeded in controlling the display of ads on a specified page as follows: I created an "ad image" in an "ad group" and allocated this to a block. Within this block's settings the "show block only on listed pages" and the url page "newslist" added. The correct ad displays in the header of this "newslist" page.

However, the article headline links listed on this page (created and filtered with Views module) are obviously of the form mydomain.com/node/xx, whereas my article list page is of the form mydomain.com/newslist1, where newslist1 is one of the taxonomy terms allocated to a story when created.

My query, therefore, is how do I control the ads displayed when the term related full article page is presented?

I had expected the article url to be of the form newslist/node/xx in which case I would be able to control the ad with newslist/*. I think I am missing a fundamental point here, as Drupal site article nodes seem always to be in the root.

I am wondering now whether I have to use the "Show if the following PHP code reurns TRUE" option in the Block settings to filter on the term newslist1.

If so, as I am not really a coder, what would the syntax be for this.
.. or am I barking up the wrong tree?
Surely there must be a relatively simple solution.

I have spent all day searching forums etc for a possible solution but to no avail. No-one appears to have had a similar difficulty. Please can anyone help?