INTEREST RATE - The price charged per unit of money borrowed per year, or other unit of time, usually expressed as a percentage.
( ( ( ( INTEREST RATE ) - ) ( ( ( ( ( The price ) ( charged ( per ( unit ( of ( money ( borrowed ( per year ) ) ) ) ) ) ) ) , ) or ) ( ( ( ( other unit ) ( of time ) ) , ) ( usually ( expressed ( as ( a percentage ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NN INTEREST) (NN RATE)) (: -) (NP (NP (NP (DT The) (NN price)) (VP (VBN charged) (PP (IN per) (NP (NP (NN unit)) (PP (IN of) (NP (NP (NN money)) (VP (VBN borrowed) (PP (IN per) (NP (NN year)))))))))) (, ,) (CC or) (NP (NP (JJ other) (NN unit)) (PP (IN of) (NP (NN time))) (, ,) (VP (ADVP (RB usually)) (VBN expressed) (PP (IN as) (NP (DT a) (NN percentage)))))) (. .)))
Interest rate can range from zero to fifteen percent. 
( ( Interest rate ) ( ( can ( ( range ( from zero ) ) ( to ( fifteen percent ) ) ) ) . ) )
(ROOT (S (NP (NN Interest) (NN rate)) (VP (MD can) (VP (VB range) (PP (IN from) (NP (CD zero))) (PP (TO to) (NP (CD fifteen) (NN percent))))) (. .)))