And, I don't know, it's like my grandparents, I'm the youngest one.
( And ( ( , ( ( I ( ( do n't ) ( ( know , ) ( it ( 's ( like ( my grandparents ) ) ) ) ) ) ) , ) ) ( I ( ( 'm ( the ( youngest one ) ) ) . ) ) ) )
(ROOT (S (CC And) (PRN (, ,) (S (NP (PRP I)) (VP (VBP do) (RB n't) (VP (VB know) (, ,) (SBAR (S (NP (PRP it)) (VP (VBZ 's) (PP (IN like) (NP (PRP$ my) (NNS grandparents))))))))) (, ,)) (NP (PRP I)) (VP (VBP 'm) (NP (DT the) (JJS youngest) (NN one))) (. .)))
I am the youngest one. 
( I ( ( am ( the ( youngest one ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP am) (NP (DT the) (JJS youngest) (NN one))) (. .)))