Part of the reason for the difference in pieces per possible delivery may be due to the fact that five percent of possible residential deliveries are businesses, and it is thought, but not known, that a lesser percentage of possible deliveries on rural routes are businesses.
( ( ( ( ( ( Part ( of ( ( the reason ) ( for ( ( the difference ) ( in ( pieces ( per ( possible delivery ) ) ) ) ) ) ) ) ) ( may ( ( be ( due ( to ( the fact ) ) ) ) ( that ( ( ( five percent ) ( of ( possible ( residential deliveries ) ) ) ) ( are businesses ) ) ) ) ) ) , ) and ) ( it ( ( ( ( ( is thought ) , ) but ) not ) ( ( known , ) ( that ( ( ( a ( lesser percentage ) ) ( of ( ( possible deliveries ) ( on ( rural routes ) ) ) ) ) ( are businesses ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (NN Part)) (PP (IN of) (NP (NP (DT the) (NN reason)) (PP (IN for) (NP (NP (DT the) (NN difference)) (PP (IN in) (NP (NP (NNS pieces)) (PP (IN per) (NP (JJ possible) (NN delivery)))))))))) (VP (MD may) (VP (VB be) (ADJP (JJ due) (PP (TO to) (NP (DT the) (NN fact)))) (SBAR (IN that) (S (NP (NP (CD five) (NN percent)) (PP (IN of) (NP (JJ possible) (JJ residential) (NNS deliveries)))) (VP (VBP are) (NP (NNS businesses)))))))) (, ,) (CC and) (S (NP (PRP it)) (VP (VP (VBZ is) (VP (VBN thought))) (, ,) (CC but) (RB not) (VP (JJ known) (, ,) (SBAR (IN that) (S (NP (NP (DT a) (JJR lesser) (NN percentage)) (PP (IN of) (NP (NP (JJ possible) (NNS deliveries)) (PP (IN on) (NP (JJ rural) (NNS routes)))))) (VP (VBP are) (NP (NNS businesses)))))))) (. .)))
Reason for a lesser pecentage of possible deliveries on rural routes might become more clear in the future.
( ( Reason ( for ( ( a ( lesser pecentage ) ) ( of ( ( possible deliveries ) ( on ( rural routes ) ) ) ) ) ) ) ( ( might ( ( become ( more clear ) ) ( in ( the future ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Reason)) (PP (IN for) (NP (NP (DT a) (JJR lesser) (NN pecentage)) (PP (IN of) (NP (NP (JJ possible) (NNS deliveries)) (PP (IN on) (NP (JJ rural) (NNS routes)))))))) (VP (MD might) (VP (VB become) (ADJP (RBR more) (JJ clear)) (PP (IN in) (NP (DT the) (NN future))))) (. .)))