Indicate the Name and age of all individuals over 20

SELECT ?y
FROM <http://www.cs.uga.edu/~mperry/people.rdf>
WHERE (?x,<dt:age>,?z),(?x,<dt:name>,?y)
AND ?z>20
USING dt for <http://foo.org#>, rdf for <http://www.w3.org/1999/02/22-rdf-syntax-ns#>


If A is friend of B and B is a friend of A report them

SELECT ?x,?y
FROM <http://www.cs.uga.edu/~mperry/people.rdf>
WHERE (?x,<dt:friend>,?y),(?y,<dt:friend>,?x)
AND ?x != ?y
USING dt for <http://foo.org#>, rdf for <http://www.w3.org/1999/02/22-rdf-syntax-ns#>

What direct Relationship Exists between Peter and Carl

SELECT ?x
FROM <http://www.cs.uga.edu/~mperry/people.rdf>
WHERE (<http://foo.org/persons/Peter>, ?x ,<http://foo.org/persons/Carl>)
USING dt for <http://foo.org#>, rdf for <http://www.w3.org/1999/02/22-rdf-syntax-ns#>

Show all the members of the team:


SELECT ?z
FROM  <http://www.cs.uga.edu/~mperry/people.rdf>
WHERE (?y, <rdf:type>, <rdf:Bag>), (?y, ?x, ?z), (?q, ?w, ?y)
AND ?x != "http://www.w3.org/1999/02/22-rdf-syntax-ns#type" &&
?q == "http://foo.org/team"
USING dt for <http://foo.org#>, rdf for <http://www.w3.org/1999/02/22-rdf-syntax-ns#>