There was confusion at that moment in the FAA.
( There ( ( was ( confusion ( at ( ( that moment ) ( in ( the FAA ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBD was) (NP (NP (NN confusion)) (PP (IN at) (NP (NP (DT that) (NN moment)) (PP (IN in) (NP (DT the) (NNP FAA))))))) (. .)))
The FAA was confused because of receiving mixed signals.
( ( The FAA ) ( ( was ( confused ( because ( of ( receiving ( mixed signals ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP FAA)) (VP (VBD was) (VP (VBN confused) (PP (RB because) (IN of) (S (VP (VBG receiving) (NP (VBN mixed) (NNS signals))))))) (. .)))