Examples

Unlike conventional parsers, the Enju parser can output predicate argument structures in addition to parse trees.

By running Enju without any command-line arguments, the parser outputs only predicate-argument relations. They look similar to labeled dependency structures, and are easy to use. Actual examples of predicate argument structures are shown below. Each line in the output represents a predicate-argument relation between two words. For instance, the second line in the first example indicates that there is an "ARG1 (logical subject)" relation between the predicate "run" and the argument "he". Note that the same semantic relations holding among the three words, "he", "run", and "company", are obtained from sentences written in different syntactic structures.

Sentence 1: He runs the company.

ROOT	ROOT	ROOT	ROOT	-1	ROOT	ROOT	runs	run	VBZ	VB	1
runs	run	VBZ	VB	1	verb_arg12	ARG1	He	he	PRP	PRP	0
runs	run	VBZ	VB	1	verb_arg12	ARG2	company	company	NN	NN	3
the	the	DT	DT	2	det_arg1	ARG1	company	company	NN	NN	3

Sentence 2: The company that he runs is small.

ROOT	ROOT	ROOT	ROOT	-1	ROOT	ROOT	is	be	VBZ	VB	5
is	be	VBZ	VB	5	verb_arg12	ARG1	company	company	NN	NN	1
is	be	VBZ	VB	5	verb_arg12	ARG2	small	small	JJ	JJ	6
small	small	JJ	JJ	6	adj_arg1	ARG1	company	company	NN	NN	1
The	the	DT	DT	0	det_arg1	ARG1	company	company	NN	NN	1
that	that	IN	IN	2	relative_arg1	ARG1	company	company	NN	NN	1
runs	run	VBZ	VB	4	verb_arg12	ARG1	he	he	PRP	PRP	3
runs	run	VBZ	VB	4	verb_arg12	ARG2	company	company	NN	NN	1