My mom knows.
( ( My mom ) ( knows . ) )
(ROOT (S (NP (PRP$ My) (NN mom)) (VP (VBZ knows)) (. .)))
My mother has knowledge of this.
( ( My mother ) ( ( has ( knowledge ( of this ) ) ) . ) )
(ROOT (S (NP (PRP$ My) (NN mother)) (VP (VBZ has) (NP (NP (NN knowledge)) (PP (IN of) (NP (DT this))))) (. .)))