( ( ( ( The ( molecular biology ) ) ( of ( human ( immunodeficiency virus ) ) ) ) ( type 1 ) ) . )
(ROOT (NP (NP (NP (DT The) (JJ molecular) (NN biology)) (PP (IN of) (NP (JJ human) (JJ immunodeficiency) (NN virus)))) (ADJP (NN type) (CD 1)) (. .)))
The molecular biology of human immunodeficiency virus type 1.
(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))))))) (. .)))