( ( ( ( ( This ( is ( because ( ( stored ( ( memories and ) emotions ) ) ( are ( linked ( with ( a ( scent memory ) ) ) ) ) ) ) ) ) , ) and ) ( memories ( ( are often ) ( triggered ( by ( a fragrance ) ) ) ) ) ) . )
(ROOT (S (S (NP (DT This)) (VP (VBZ is) (SBAR (IN because) (S (NP (JJ stored) (NNS memories) (CC and) (NNS emotions)) (VP (VBP are) (VP (VBN linked) (PP (IN with) (NP (DT a) (JJ scent) (NN memory))))))))) (, ,) (CC and) (S (NP (NNS memories)) (VP (VBP are) (ADVP (RB often)) (VP (VBN triggered) (PP (IN by) (NP (DT a) (NN fragrance)))))) (. .)))
This is because stored memories and emotions are linked with a scent memory, and memories are often triggered by a fragrance.
(ROOT (S (NP (JJ Specific) (NNS scents)) (VP (VBP are) (ADVP (RB often)) (VP (VBN associated) (PP (IN with) (NP (NNS memories))))) (. .)))