S                          1 (S DECL MAJOR) 
                 NP                       2 (THAT-C SG DET NP DEF 3P) 
THE                "THE"                  0 (DET SG MASS PL DEF NGSTART ART) 
                   NBAR                   5 (NBAR SG THAT-C) 
REPORT               "REPORT"             3 (NGSTART NOUN SG NONCOUNT THAT-C) 
                   S                     12 (S SEC COMP-S THAT-S) 
                     COMP                11 (COMP THAT-COMP) 
THAT                   "THAT"             4 (COMP THAT-COMP) 
                     NP                   7 (PRON-NP NP PERS 3P SG NOM) 
SHE                    "SHE"              6 (NGSTART PRONOUN PERS F 3P SG NOM) 
                     AUX                 13 (PRES AUX PERF) 
HAD                    "HAVE"             8 (VERB AUXVERB PAST PASTP TRANS
                                             NULL-INF-C NP-VP-C S-PASTP-C    
                                             NP-VING-C NP-ADJ-C) 
                     VP                  19 (VP) 
WRITTEN                "WRITE"            9 (VERB PASTP TRANS INTRANS THAT
                                             THAT-C NP-THAT-C IO-NP-C Q-C)   
                 AUX                     20 (AUX PAST) 
                 VP                      21 (VP COPULA) 
WAS                "BE"                  10 (VERB AUXVERB PAST SG COPULA COP-NP
                                             ADJ-C COP-ADV COP-PP NULL-INF-C 
                                             Q-C FOR-NP-INF-C THAT-C PAST-C) 
                   AP                    15 (IT-SUBJ-FOR-NP-INF IT-SUBJ-INF 
                                             AP NONDET-AP ADJ-COMP) 
INCORRECT            "INCORRECT"         14 (IT-SUBJ-INF IT-SUBJ-FOR-NP-INF) 
<~PERIOD~>       "<~PERIOD~>"            16 (FINALPUNC DECL) 
 
Do you accept this parse as valid? (Y or N) No 

               S                          1 (S DECL MAJOR) 
                 NP                       2 (3P DEF NP DET SG THAT-C MODIFIED) 
THE                "THE"                  0 (DET SG MASS PL DEF NGSTART ARTT) 
                   NBAR                   5 (NBAR SG THAT-C) 
REPORT               "REPORT"             3 (NGSTART NOUN SG NONCOUNT 
                                             THAT THAT-C) 
                   S                     23 (S SEC RELATIVE) 
(NP-2)               COMP                22 (SG 3P COMP WH-COMP REL UTILIZED) 
THAT                   "THAT"             4 (WH REL UTILIZED) 
                     NP                   7 (PRON-NP NP PERS 3P SG NOM) 
SHE                    "SHE"              6 (NGSTART PRONOUN PERS F 3P SG NOM) 
                     AUX                 24 (PRES AUX PERF) 
HAD                    "HAVE"             8 (VERB AUXVERB PAST PASTP TRANS
                                             NULL-INF-C NP-VP-C S-PASTP-C 
                                             NP-VING-C NP-ADJ-C) 
                     VP                  26 (VP) 
WRITTEN                "WRITE"            9 (VERB PASTP TRANSINTRANS THAT-C 
                                             NP-THAT-C IO-NP-C Q-C NP-INF-C) 
(COMP-22)              NP                27 (NP NOT-MODIFIABLE NTRACE) 
                 AUX                     28 (AUX PAST) 
                 VP                      29 (VP COPULA) 
WAS                "BE"                  10 (VERB AUXVERB PAST SG COPULA
                                             COP-NP ADJ-C COP-ADV COP-PP
                                             NULL-INF-C Q-C FOR-NP-INF-C
                                             THAT-C PAST-C)
                   AP                    25 (IT-SUBJ-INF IT-SUBJ-FOR-NP-INF 
                                             AP NONDET-AP ADJ-COMP) 
INCORRECT            "INCORRECT"         14 (ADJ IT-SUBJ-FOR-NP-INF
                                             IT-SUBJ-INF UTILIZED) 
<~PERIOD~>       "<~PERIOD~>"            16 (FINALPUNC DECL) 


Two Parse Trees for a Syntactically Ambiguous Sentence