Even for basic products, demand varies from day to day and week to week.
( ( Even ( for ( basic products ) ) ) ( , ( demand ( ( ( varies ( from ( day ( to ( ( day and ) week ) ) ) ) ) ( to week ) ) . ) ) ) )
(ROOT (S (PP (RB Even) (IN for) (NP (JJ basic) (NNS products))) (, ,) (NP (NN demand)) (VP (VBZ varies) (PP (IN from) (NP (NP (NN day)) (PP (TO to) (NP (NN day) (CC and) (NN week))))) (PP (TO to) (NP (NN week)))) (. .)))
Variation in demand is welcome in all industries.
( ( Variation ( in demand ) ) ( ( is ( welcome ( in ( all industries ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Variation)) (PP (IN in) (NP (NN demand)))) (VP (VBZ is) (ADJP (JJ welcome) (PP (IN in) (NP (DT all) (NNS industries))))) (. .)))