Minutes later, United 175 turned southwest without clearance from air traffic control.
( ( Minutes later ) ( , ( ( United 175 ) ( ( ( ( turned southwest ) ( without clearance ) ) ( from ( air ( traffic control ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Minutes) (RB later)) (, ,) (NP (NNP United) (CD 175)) (VP (VBD turned) (NP (NN southwest)) (PP (IN without) (NP (NN clearance))) (PP (IN from) (NP (NN air) (NN traffic) (NN control)))) (. .)))
United 175 stayed on its expected course.  
( ( United 175 ) ( ( stayed ( on ( its ( expected course ) ) ) ) . ) )
(ROOT (S (NP (NNP United) (CD 175)) (VP (VBD stayed) (PP (IN on) (NP (PRP$ its) (JJ expected) (NN course)))) (. .)))