Possible error in RDF 1.1 Primer

Dear Sir or Madam,

while reading the RDF 1.1 Primer document (https://www.w3.org/TR/rdf11-primer/), I noticed something that I believe is an error.

You write the following:

"Lines 1-7 represent quads, where the first element constitutes the graph IRI. The part of the quad after the graph IRI specifies the subject, predicate and object of the statement, following the syntactic conventions of N-Triples."

Isn't it the case that the fourth element forms the graph IRI, not the first? Also, in the first line of Example 11, "<http://example.org/bob>" is the fourth element and also the graph IRI.

I am looking forward to an answer and wish best regards!

Johannes Scheiermann