It turns out I was thinking about this all wrong. All I need to do is
(i) set the group using GROUP
(ii) execute the NEXT command followed by HEAD for however many headers I want (up to count):
for c : count do
articleId <-- NEXT
HEAD articleID
end
EDIT: I'm sure there must be a better way but until anyone suggests otherwise I'll assume this way to be the most effective. Cheers.