( Viruses ( ( are ( among ( the ( smallest ( biological entities ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Viruses)) (VP (VBP are) (PP (IN among) (NP (DT the) (JJS smallest) (JJ biological) (NNS entities)))) (. .)))
Viruses are among the smallest biological entities.
(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))))))) (. .)))