*
Query 1',2':

Returned in several seconds.

Query 1":

error: Virtuoso RDFZZ Error DB.DBA.SPARQL_REXEC('http://pharmgkb.bio2rdf.org/sparql', ...) has received result with unexpected variable name 'stubvar11'


Query 2":

error: Virtuoso S1T00 Error SR171: Transaction timed out

Query 3' & 3":

timed out

Query 4':
Virtuoso 42000 Error SR596: Unable to place abnormally long XML tree, 2097151 elements are above 2097151 limit

Query 4":

returned results in several seconds.