So, I have my sister's kid here and I'm going to kill him underneath this vehicle shortly.
( So ( , ( ( ( ( I ( have ( ( ( my ( sister 's ) ) kid ) here ) ) ) and ) ( I ( 'm ( going ( to ( ( ( kill him ) ( underneath ( this vehicle ) ) ) shortly ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB So)) (, ,) (S (NP (PRP I)) (VP (VBP have) (NP (NP (NP (PRP$ my) (NN sister) (POS 's)) (NN kid)) (ADVP (RB here))))) (CC and) (S (NP (PRP I)) (VP (VBP 'm) (VP (VBG going) (S (VP (TO to) (VP (VB kill) (NP (PRP him)) (PP (IN underneath) (NP (DT this) (NN vehicle))) (ADVP (RB shortly)))))))) (. .)))
My sister does not have a child. 
( ( My sister ) ( ( ( does not ) ( have ( a child ) ) ) . ) )
(ROOT (S (NP (PRP$ My) (NN sister)) (VP (VBZ does) (RB not) (VP (VB have) (NP (DT a) (NN child)))) (. .)))