( Potyviruses ( ( are ( ( the ( ( most ( ( abundant and ) damaging ) ) viruses ) ) ( in ( agricultural systems ) ) ) ) . ) )
(ROOT (S (NP (NNS Potyviruses)) (VP (VBP are) (NP (NP (DT the) (ADJP (RBS most) (JJ abundant) (CC and) (JJ damaging)) (NNS viruses)) (PP (IN in) (NP (JJ agricultural) (NNS systems))))) (. .)))
Potyviruses are the most abundant and damaging viruses in agricultural systems.
(ROOT (S (NP (NNS Viruses)) (VP (VBP are) (NP (NP (DT the) (ADJP (RBS most) (JJ abundant)) (NN type)) (PP (IN of) (NP (NP (JJ biological) (NN entity)) (PP (IN on) (NP (DT the) (NN earth))))))) (. .)))