You can download the dataset for these queries JamesDean.ttl. and Family.ttl
You can cross-reference the queries to the book by query number or name.
Query ch6.27 Directors are people who direct movies 
The resource jd6:Director wasn't defined in the input data; we are defining it here. This query doesn't give it a type; is it a class? A property? An individual member of some class we already know about (jd6:Woman,, jd6:Man, etc.)? This query is a bit deficient in this regard.
Query ch6.28 A man is his father's son
In this case, family:hasSon is already defined as part of the input data. We're just giving more information about how we think it should be used.