Syntax Tree & Generative Grammer

SNPPRONHeVPVERBseesNPDETaNOUNpiano

1. Tree

#----------------------------------#
# Default Generative Grammar Rules #
#----------------------------------#

S -> NP VP
S -> NP RC
S -> 'If' S 'then' S

VP -> VERB
VP -> VERB NP
VP -> VERB ADJ
VP -> VP PP
VP -> AUX VP
VP -> AUX 'not' VP
VP -> VP CCONJ VP

NP -> NOUN
NP -> DET NOUN
NP -> DET PROPN
NP -> PROPN
NP -> PRON
NP -> NP PP
NP -> NP RC
NP -> NP CCONJ NP

PP -> P NP

RC -> RPRON S

#---------------------------------#
# POS of sentence tagged by spaCy #
#---------------------------------#

PRON -> 'He'
VERB -> 'sees'
DET -> 'a'
NOUN -> 'piano'

Syntax Tree Bracket Notation

(S (NP (PRON He)) (VP (VERB sees) (NP (DET a) (NOUN piano))))

1. Tree