In practice, however, retail inventory management is fraught with challenges, such as long and uncertain order-fulfillment lead times, and errors in product identification and record keeping.
( ( In practice ) ( , ( however ( , ( ( retail ( inventory management ) ) ( ( ( is ( fraught ( with ( ( challenges , ) ( such ( as ( ( ( ( ( ( long and ) uncertain ) ( order-fulfillment ( lead times ) ) ) , ) and ) ( errors ( in ( product ( ( identification and ) record ) ) ) ) ) ) ) ) ) ) ) keeping ) . ) ) ) ) ) )
(ROOT (S (PP (IN In) (NP (NN practice))) (, ,) (ADVP (RB however)) (, ,) (NP (JJ retail) (NN inventory) (NN management)) (VP (VBZ is) (ADJP (JJ fraught) (PP (IN with) (NP (NP (NNS challenges)) (, ,) (PP (JJ such) (IN as) (NP (NP (ADJP (JJ long) (CC and) (JJ uncertain)) (JJ order-fulfillment) (JJ lead) (NNS times)) (, ,) (CC and) (NP (NP (NNS errors)) (PP (IN in) (NP (NN product) (NN identification) (CC and) (NN record))))))))) (S (VP (VBG keeping)))) (. .)))
Retail inventory management has many problems, most of which still haven't been solved today.
( ( Retail ( inventory management ) ) ( ( has ( ( ( many problems ) , ) ( ( most ( of which ) ) ( still ( ( have n't ) ( been ( solved today ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Retail) (NN inventory) (NN management)) (VP (VBZ has) (NP (NP (JJ many) (NNS problems)) (, ,) (SBAR (WHNP (JJS most) (WHPP (IN of) (WHNP (WDT which)))) (S (ADVP (RB still)) (VP (VBP have) (RB n't) (VP (VBN been) (VP (VBN solved) (NP (NN today))))))))) (. .)))