When I have an expression comprising two nouns does the article (a/an/the) refer to the first or to the second one? E.g. when talking about some group (we introduced it, there's only one), we would use the when referring to the group but then we also introduce someone being the leader of the group:
...there are at least 10 people in the group. However, if there's a group leader, we'd have to...
And even when I write that, I lean towards the a version as it just sounds natural to me. So that would mean the article refers to the 2nd noun (being the main object) and not the 1st one (acting as an epithet here). But is that correct? Is that always the case?