The forecasting challenges retailers confront have been amplified in recent years by product proliferation in almost every category.
( ( The forecasting ) ( ( challenges ( retailers ( confront ( have ( been ( ( amplified ( in ( recent years ) ) ) ( by ( ( product proliferation ) ( in ( almost ( every category ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN forecasting)) (VP (VBZ challenges) (SBAR (S (NP (NNS retailers)) (VP (VBP confront) (VP (VB have) (VP (VBN been) (VP (VBN amplified) (PP (IN in) (NP (JJ recent) (NNS years))) (PP (IN by) (NP (NP (NN product) (NN proliferation)) (PP (IN in) (NP (RB almost) (DT every) (NN category)))))))))))) (. .)))
More and more products are being made and sold which makes forecasting more challenging.
( ( ( More and ) more ) ( products ( ( are ( being ( ( ( made and ) sold ) ( which ( makes ( forecasting ( more challenging ) ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RBR More) (CC and) (RBR more)) (NP (NNS products)) (VP (VBP are) (VP (VBG being) (VP (VBN made) (CC and) (VBN sold) (SBAR (WHNP (WDT which)) (S (VP (VBZ makes) (S (VP (VBG forecasting) (ADJP (RBR more) (JJ challenging)))))))))) (. .)))