I look nobody is standing at the saw.
( I ( ( look ( nobody ( is ( standing ( at ( the saw ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP look) (SBAR (S (NP (NN nobody)) (VP (VBZ is) (VP (VBG standing) (PP (IN at) (NP (DT the) (NN saw)))))))) (. .)))
Nobody is standing at the saw, they were all sitting on the floor.
( ( Nobody ( is ( standing ( at ( the saw ) ) ) ) ) ( , ( they ( ( ( were all ) ( sitting ( on ( the floor ) ) ) ) . ) ) ) )
(ROOT (S (S (NP (NN Nobody)) (VP (VBZ is) (VP (VBG standing) (PP (IN at) (NP (DT the) (NN saw)))))) (, ,) (NP (PRP they)) (VP (VBD were) (RB all) (VP (VBG sitting) (PP (IN on) (NP (DT the) (NN floor))))) (. .)))