( ( ( 4.2 ( Positive ( and ( Negative Test ) ) ) ) Results ) . )
(ROOT (NP (NP (CD 4.2) (JJ Positive) (CC and) (JJ Negative) (NN Test)) (NP (NNS Results)) (. .)))
4.2 Positive and Negative Test Results.
(ROOT (S (NP (PRP We)) (VP (VBP call) (NP (NP (DT an) (JJ incorrect) (NN test) (NN result)) (SBAR (WHNP (WDT that)) (S (VP (MD should) (VP (VB have) (VP (VBN been) (ADJP (JJ positive) (NP (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-)) (ADJP (JJ false) (JJ negative))))))))))) (. .)))