# Q1:
SELECT DISTINCT ?s ?g WHERE { GRAPH ?g { ?s <http://dbpedia.org/property/awards> <http://dbpedia.org/resource/Nobel_Prize_in_physics> . }}

# Q2:
SELECT DISTINCT ?s ?g WHERE { GRAPH ?g { ?s <http://www.w3.org/2004/02/skos/core#subject> <http://dbpedia.org/resource/Category:American_documentary_films> . }}

# Q3:
SELECT DISTINCT ?s ?g WHERE { GRAPH ?g { ?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2002/07/owl#Class> . }}

# Q4:
SELECT DISTINCT ?s ?g WHERE { GRAPH ?g { ?s <http://dbpedia.org/property/settlementType> "Town" . }}

# Q5:
SELECT DISTINCT ?s ?g WHERE { GRAPH ?g { ?s <http://xmlns.com/foaf/0.1/name> "Samuel" . } UNION { ?s <http://xmlns.com/foaf/0.1/name> "Elisabeth" . }}

# Q6:
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> . }}

# Q7:
SELECT DISTINCT ?s ?g WHERE { GRAPH ?g { ?s <http://xmlns.com/foaf/0.1/knows> ?o . }}