ling 581 advanced computational linguistics n.
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LING 581: Advanced Computational Linguistics. Lecture Notes January 19th. Administrivia. New room Shantz 338 ( I have asked Jennifer Columbus to investigate refund: however, I’m told it may not happen ). Marshall 480. Shantz 338. Penn Treebank. Availability Source:

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administrivia
Administrivia
  • New room
    • Shantz 338
    • (I have asked Jennifer Columbus to investigate refund: however, I’m told it may not happen)

Marshall

480

Shantz

338

penn treebank
Penn Treebank
  • Availability
    • Source:
      • Linguistic Data Consortium (LDC)
      • U. of Arizona is a (fee-paying) member of this consortium
      • Resources are made available to the community through the main library
      • URL
        • http://sabio.library.arizona.edu/search/X
penn treebank1
Penn Treebank

Tagging Guide

Arpa94 paper

Parse Guide

penn treebank3
Penn Treebank

sections 00-24

tregex
tregex
  • Tregex is a Tgrep2-style utility for matching patterns in trees.

written

In Java

run-tregex-gui.commandshell script

-mx flag, the 300m default memory size will need to be increased depending on the platform

tregex1
tregex
  • Select the PTB directory
    • TREEBANK_3/parsed/mrg/wsj/
  • Browse

Deselect any unwanted files

tregex2
tregex
  • Search
tregex3
tregex

Help

tregex4
tregex
  • Help
tregex5
tregex
  • Help
tregex6
tregex
  • Help
tregex7
tregex
  • Help
tregex8
tregex
  • Pattern:
    • (@NP <, (@NP $+ (/,/ $+ (@NP $+ /,/=comma))) <- =comma)
tregex9
tregex
  • Help
tregex11
tregex
  • Different results from:
    • @SBAR < /^WH.*-([0-9]+)$/#1%index << (@NP < (/^-NONE-/ < /^\*T\*-([0-9]+)$/#1%index))
tregex12
tregex

Example:

WHADVP

also possible

(not just WHNP)

ungraded homework exercise
Ungraded Homework Exercise
  • Search for NP trace relative clauses as defined below:

Be ready to

compare search

pattern and

number

found next time

in class