import rdflib, sys # rdflib.net
ts = rdflib.ConjunctiveGraph()
querystring = ""
for i in sys.argv[1:]:
	ts.parse("http://tools.opiumfield.com/twitter/" + i + "/rdf")
	querystring = querystring + "<http://twitter.com/" + i + "> <http://xmlns.com/foaf/0.1/knows> ?person . "
res = ts.query("SELECT DISTINCT ?person WHERE { " + querystring + " }")
for i in res:
	print str(i[0])