 No, someone brought Mom the necklace as a gift.
( No ( , ( someone ( ( ( brought Mom ) ( ( the necklace ) ( as ( a gift ) ) ) ) . ) ) ) )
(ROOT (S (INTJ (UH No)) (, ,) (NP (NN someone)) (VP (VBD brought) (NP (NN Mom)) (NP (NP (DT the) (NN necklace)) (PP (IN as) (NP (DT a) (NN gift))))) (. .)))
Someone gave the necklace to mom as a gift.
( Someone ( ( ( ( gave ( the necklace ) ) ( to mom ) ) ( as ( a gift ) ) ) . ) )
(ROOT (S (NP (NN Someone)) (VP (VBD gave) (NP (DT the) (NN necklace)) (PP (TO to) (NP (NN mom))) (PP (IN as) (NP (DT a) (NN gift)))) (. .)))