(S (S (BASENP (DT The) (NNS authorities)) (VP (VBP are) (VP (ADVP (RB also)) (VP (VP (VBG preventing) (BASENP (JJ non-governmental) (NNS organizations))) (PP (IN from) (S (VP (VBG providing) (NP (BASENP (NN aid)) (PP (TO to) (NP (BASENP (DT those)) (SBAR (WHNP (WP who)) (S (VP (VBP have) (VP (VBN lost) (BASENP (PRPD their) (NNS homes)))))))))))))))) (PERIOD .))