(S (S (BASENP (NNS Officials)) (VP (VP (VBP have) (VP (VP (VBN blocked) (PRT (RP off))) (NP (NP (NP (BASENP (DT an) (NN area)) (PP (IN of) (BASENP (NNP Dresden)))) (NP (NP (BASENP (QP (RB approximately) (NN 1.9)) (NNS miles)) (PRN (LRB -LRB-) (BASENP (NN 3km)) (RRB -RRB-))) (PP (IN from) (BASENP (DT the) (NN site))))) (SBAR (WHADVP (WRB where)) (S (BASENP (DT the) (NN swan)) (VP (VBD was) (VP (VBN found)))))))) (CC and) (VP (VBP have) (VP (VP (VP (VBN posted) (BASENP (NN observation) (NNS areas))) (PP (IN at) (NP (NP (BASENP (QP (RB approximately) (NN 6.2)) (NNS miles)) (PRN (LRB -LRB-) (BASENP (NN 10km)) (RRB -RRB-))) (PP (IN outside) (BASENP (DT the) (NN area)))))) (PP (IN as) (BASENP (DT a) (NN precaution))))))) (PERIOD .))