</S1> IRI {} AND {} /S1 ( IRI {} ) AND {} /S1 => [IRI {}] AND ( => [IRI {}] ) AND => [IRI {}] /S1 => [IRI, .] AND ( => [IRI, .] ) OR => [IRI, .] AND => [IRI, .] OR ( => [IRI, .] ) AND => [IRI, .] /S1 => [IRI, .] OR LPAREN => [IRI, .] RPAREN AND LPAREN => [IRI, .] OR => [IRI, .] RPAREN AND LPAREN LPAREN => [IRI, .] RPAREN OR => [IRI, .] RPAREN /S1 BNODE {} OR /^/ {} </S1> {} AND IRI {} </S1> ( IRI {} ) AND {} </S1> {} AND ( IRI {} )