1. LING 581: Advanced Computational Linguistics Lecture Notes January 19th

2. 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

3. 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

4. Penn Treebank (V3) Call Record

5. Penn Treebank 1.Tagging Guide 2.Arpa94 paper 3.Parse Guide 1.Tagging Guide 2.Arpa94 paper 3.Parse Guide

6. Penn Treebank

7. sections 00-24

8. Penn Treebank

9. tregex Tregex is a Tgrep2-style utility for matching patterns in trees. written In Java written In Java run-tregex-gui.command shell script -mx flag, the 300m default memory size will need to be increased depending on the platform

10. tregex Select the PTB directory – TREEBANK_3/parsed/mrg/wsj/ Browse Deselect any unwanted files

11. tregex Search

12. tregex Help

13. tregex Help

14. tregex Help

15. tregex Help

16. tregex Help

17. tregex Pattern: – (@NP <, (@NP $+ (/,/ $+ (@NP $+ /,/=comma))) <- =comma)

18. tregex Help

19. tregex

20. Different results from: – @SBAR < /^WH.*-([0-9]+)$/#1%index << (@NP < (/^-NONE-/ < /^\*T\*-([0-9]+)$/#1%index))

21. tregex Example: WHADVP also possible (not just WHNP)

22. 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