Here we have the sense that the embedded clause who were attending the rock conceit is closely associated with the head NP, “the fans, In fact we find that the clause has a modifying function much like an adjective; it tells us which “ fans ’’ had to wait in a long line. Perheps now it is apparent why such clause are called “ restrictive ’’ (or in some grammars “defining or limiting ’’ or “adjective ’’ clause) They restrict or identify for us which noun (s)---of all nouns in the same set we are speaking about (i.e.,anybody who could be called a fun)