# A1:
SELECT DISTINCT ?s ?g WHERE { GRAPH ?g { ?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ?o . }}

# A2:
SELECT DISTINCT ?s ?g WHERE { GRAPH ?g { ?s ?p <http://dbpedia.org/resource/Greenwich_Mean_Time> . }}

# B1:
SELECT DISTINCT ?s ?g WHERE { GRAPH ?g { ?s <http://dbpedia.org/property/awards> <http://dbpedia.org/resource/Nobel_Prize_in_physics> . }}

# B2:
SELECT DISTINCT ?s ?g WHERE { GRAPH ?g { ?s <http://dbpedia.org/property/settlementType> "Town" . }}

# C1:
SELECT DISTINCT ?s ?g WHERE { GRAPH ?g { ?s <http://www.w3.org/2000/01/rdf-schema#isDefinedBy> <http://semanticweb.org/wiki/Special:ExportRDF/Property:Name> . ?s  <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2002/07/owl#DatatypeProperty> . }}

# C2:
SELECT DISTINCT ?s ?g WHERE { GRAPH ?g { ?s ?p <http://dbpedia.org/resource/Category:American_documentary_films> . ?s ?q "Edith Massey" . }}

# D1:
SELECT DISTINCT ?s ?g WHERE { GRAPH ?g { ?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Person> . ?s <http://xmlns.com/foaf/0.1/interest> <http://www.livejournal.com/interests.bml?int=music> . { ?s <http://xmlns.com/foaf/0.1/interest> <http://www.livejournal.com/interests.bml?int=tango> . } UNION { ?s <http://xmlns.com/foaf/0.1/interest> <http://www.livejournal.com/interests.bml?int=rock> . } } }

# E:
SELECT DISTINCT ?s ?g WHERE { GRAPH ?g { ?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Person> . OPTIONAL { ?s <http://xmlns.com/foaf/0.1/interest> ?x FILTER(?x = <http://www.livejournal.com/interests.bml?int=gothic+music>) } . FILTER(!bound(?x)) }}