( ( A ( cold front ) ) ( commonly ( ( brings ( ( ( a ( narrow band ) ) ( of precipitation ) ) ( that ( follows ( along ( ( the ( leading edge ) ) ( of ( the ( cold front ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (DT A) (JJ cold) (NN front)) (ADVP (RB commonly)) (VP (VBZ brings) (NP (NP (DT a) (JJ narrow) (NN band)) (PP (IN of) (NP (NN precipitation))) (SBAR (WHNP (WDT that)) (S (VP (VBZ follows) (PP (IN along) (NP (NP (DT the) (VBG leading) (NN edge)) (PP (IN of) (NP (DT the) (JJ cold) (NN front)))))))))) (. .)))
A cold front commonly brings a narrow band of precipitation that follows along the leading edge of the cold front.
(ROOT (NP (NP (NP (NNP Precipitation)) (ADJP (RB commonly) (JJ occur))) (PRN (-LRB- -LRB-) (PRP s) (-RRB- -RRB-)) (PP (IN along) (NP (DT a) (JJ cold) (NN front))) (. .)))
Precipitation commonly occur(s) along a cold front.