(S (S (ADVP (RB Then) (RB again)) (S (PP (IN on) (BASENP (NNP Sunday))) (COMMA ,) (S (NP (BASENP (NNS calls)) (PP (TO to) (BASENP (NNP 9-1-1)))) (VP (VBD began) (S (VP (TO to) (VP (VP (VP (VP (VB come) (PRT (RP in))) (PP (TO to) (NP (NP (NP (BASENP (NNP Williamson) (NNP County)) (COMMA ,) (BASENP (NNP Texas) (NN sheriff))) (POS 's)) (NN office)))) (NP (BASENP (RB around) (NN 12:30) (NN p.m.)) (PRN (LRB -LRB-) (BASENP (NNP Central) (NN time)) (RRB -RRB-)))) (SBAR (IN that) (S (BASENP (VBG burning) (NN debris) (CC and) (NNS fireballs)) (VP (VBD were) (VP (VBN seen) (S (VP (VBG falling) (PP (IN from) (NP (BASENP (DT the) (NN sky)) (PP (IN onto) (NP (BASENP (NNS parts)) (PP (IN of) (NP (NP (NP (BASENP (NNP Austin)) (COMMA ,) (BASENP (NNP Houston))) (COMMA ,) (BASENP (NNP Waco))) (CC and) (BASENP (NNP San) (NNP Antonio))))))))))))))))))))) (PERIOD .))