No, they didn't, no, just that one.
( No ( , ( they ( ( ( ( did n't ) ( , ( no , ) ) ) ( just ( that one ) ) ) . ) ) ) )
(ROOT (S (INTJ (UH No)) (, ,) (NP (PRP they)) (VP (VBD did) (RB n't) (PRN (, ,) (INTJ (UH no)) (, ,)) (PP (RB just) (NP (DT that) (NN one)))) (. .)))
There was only one person the whole time. 
( There ( ( ( was ( only ( one person ) ) ) ( the ( whole time ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBD was) (ADVP (RB only) (NP (CD one) (NN person))) (NP (DT the) (JJ whole) (NN time))) (. .)))