For the short term, its impact will be on a relatively small niche market.
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(ROOT (S (PP (IN For) (NP (DT the) (JJ short) (NN term))) (, ,) (NP (PRP$ its) (NN impact)) (VP (MD will) (VP (VB be) (PP (IN on) (NP (DT a) (ADJP (RB relatively) (JJ small)) (NN niche) (NN market))))) (. .)))
The impact will be on a large market.
( ( The impact ) ( ( will ( be ( on ( a ( large market ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN impact)) (VP (MD will) (VP (VB be) (PP (IN on) (NP (DT a) (JJ large) (NN market))))) (. .)))