These trainers were later heard boasting that their assistance led to the October 1993 shootdown of two U.S.
( ( These trainers ) ( ( were later ) ( heard ( boasting ( that ( ( their assistance ) ( led ( to ( ( ( the ( October ( 1993 shootdown ) ) ) ( of two ) ) U.S. ) ) ) ) ) ) ) ) )
(ROOT (S (NP (DT These) (NNS trainers)) (VP (VBD were) (ADVP (RB later)) (VP (VBN heard) (S (VP (VBG boasting) (SBAR (IN that) (S (NP (PRP$ their) (NN assistance)) (VP (VBD led) (PP (TO to) (NP (NP (NP (DT the) (NNP October) (CD 1993) (NN shootdown)) (PP (IN of) (NP (CD two)))) (NNP U.S.))))))))))))
At a later point, these trainers were heard mentioning that they had nothing to do with the shoot-down of two U.S. helicopters.
( ( At ( a ( later point ) ) ) ( , ( ( these trainers ) ( ( were ( heard ( mentioning ( that ( they ( had ( nothing ( to ( do ( with ( ( the shoot-down ) ( of ( two ( U.S. helicopters ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN At) (NP (DT a) (JJ later) (NN point))) (, ,) (NP (DT these) (NNS trainers)) (VP (VBD were) (VP (VBN heard) (S (VP (VBG mentioning) (SBAR (IN that) (S (NP (PRP they)) (VP (VBD had) (NP (NN nothing) (S (VP (TO to) (VP (VB do) (PP (IN with) (NP (NP (DT the) (NN shoot-down)) (PP (IN of) (NP (CD two) (NNP U.S.) (NNS helicopters)))))))))))))))) (. .)))