Simply put, the less certain retailers are of the demand for their product, the more safety stock they must hold to meet consumer needs.
( ( Simply put ) ( , ( ( the ( ( less certain ) retailers ) ) ( ( ( ( are ( of ( ( the demand ) ( for ( their product ) ) ) ) ) , ) ( ( the ( more ( safety stock ) ) ) ( they ( must ( hold ( to ( meet ( consumer needs ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (S (VP (ADVP (RB Simply)) (VBN put))) (, ,) (NP (DT the) (ADJP (RBR less) (JJ certain)) (NNS retailers)) (VP (VBP are) (PP (IN of) (NP (NP (DT the) (NN demand)) (PP (IN for) (NP (PRP$ their) (NN product))))) (, ,) (NP (NP (DT the) (JJR more) (NN safety) (NN stock)) (SBAR (S (NP (PRP they)) (VP (MD must) (VP (VB hold) (S (VP (TO to) (VP (VB meet) (NP (NN consumer) (NNS needs))))))))))) (. .)))
More safety stock must be held by retailers if they don't know the demand for the product.
( ( ( More safety ) stock ) ( ( must ( be ( ( held ( by retailers ) ) ( if ( they ( ( do n't ) ( know ( ( the demand ) ( for ( the product ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (ADJP (RBR More) (NN safety)) (NN stock)) (VP (MD must) (VP (VB be) (VP (VBN held) (PP (IN by) (NP (NNS retailers))) (SBAR (IN if) (S (NP (PRP they)) (VP (VBP do) (RB n't) (VP (VB know) (NP (NP (DT the) (NN demand)) (PP (IN for) (NP (DT the) (NN product))))))))))) (. .)))