(S (S (S (ADVP (RB Twice)) (S (PRN (COMMA ,) (S (BASENP (PRP they)) (VP (VBP say))) (COMMA ,)) (S (BASENP (NN radar)) (VP (VP (VBD picked) (PRT (RP up))) (NP (BASENP (DT an) (NN object)) (VP (VBG traveling) (PP (IN at) (BASENP (QP (RB nearly) (NN 2,000)) (NN mph))))))))) (CONJP (COMMA ,) (CC and)) (S (PP (IN at) (BASENP (JJ other) (NNS times))) (S (BASENP (PRP it)) (VP (VBD showed) (BASENP (DT a) (ADJP (RB slow) (VBG moving)) (NN object)))))) (PERIOD .))