( This ( ( is ( ( ( ( ( an ( alphabetical list ) ) ( of ( biological viruses ) ) ) , ) and ) ( types ( of viruses ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ is) (NP (NP (NP (DT an) (JJ alphabetical) (NN list)) (PP (IN of) (NP (JJ biological) (NNS viruses)))) (, ,) (CC and) (NP (NP (NNS types)) (PP (IN of) (NP (NNS viruses)))))) (. .)))
This is an alphabetical list of biological viruses, and types of viruses.
(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))))))) (. .)))