Four queries that combine gender and parenthood.
The data for this query can be downloaded at Family.ttl and FamiltyRules.ttl
Each of these queries includes a single triple about gender, based on definitions of mother, daughter, son, father, etc. One of the advantages of representing data in this way is that it allows us to simultaneously deal with gendered words (like mother, daughter, etc.) as well as non-gendered ones (sibling, child, parent).
Query ch6.33a Generalizing the parent relation with gender 
Query ch6.33b Generalizing the parent relation with gender
Query ch6.33c Generalizing the parent relation with gender
Query ch6.33d Generalizing the parent relation with gender