( ( ( ( ( Seeds ( are planted ) ) , ) then ) ( they grow ) ) . )
(ROOT (S (S (NP (NNS Seeds)) (VP (VBP are) (VP (VBN planted)))) (, ,) (RB then) (S (NP (PRP they)) (VP (VBP grow))) (. .)))
Seeds are planted, then they grow.
(ROOT (S (NP (JJ Heirloom) (NNS seeds)) (VP (VBP come) (PP (IN from) (NP (NP (NNS plants)) (SBAR (WHNP (WDT that)) (S (VP (VBD were) (ADVP (RB traditionally)) (VP (VBN grown) (PP (IN in) (NP (JJ human) (NNS populations))))))))) (, ,) (ADJP (RB as) (VBN opposed) (PP (TO to) (NP (NP (DT the) (NNS seeds)) (VP (VBN used) (PP (IN for) (NP (JJ large-scale) (JJ agricultural) (NN production)))))))) (. .)))