It has long been known that inventories at the macroeconomic level affect the depth and length of business cycles.
( It ( ( ( has long ) ( been ( known ( that ( ( inventories ( at ( the ( macroeconomic level ) ) ) ) ( affect ( ( the ( ( depth and ) length ) ) ( of ( business cycles ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ has) (ADVP (RB long)) (VP (VBN been) (VP (VBN known) (SBAR (IN that) (S (NP (NP (NNS inventories)) (PP (IN at) (NP (DT the) (JJ macroeconomic) (NN level)))) (VP (VBP affect) (NP (NP (DT the) (NN depth) (CC and) (NN length)) (PP (IN of) (NP (NN business) (NNS cycles)))))))))) (. .)))
It is unknown whether business cycles are affected by inventories at the macroeconomic level.
( It ( ( ( is unknown ) ( whether ( ( business cycles ) ( are ( affected ( by ( inventories ( at ( the ( macroeconomic level ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (ADJP (JJ unknown)) (SBAR (IN whether) (S (NP (NN business) (NNS cycles)) (VP (VBP are) (VP (VBN affected) (PP (IN by) (NP (NP (NNS inventories)) (PP (IN at) (NP (DT the) (JJ macroeconomic) (NN level)))))))))) (. .)))