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Advanced Computational Linguistics Lecture Notes - January 19th Overview

This entry outlines key points from the Advanced Computational Linguistics lecture held on January 19th. It covers updates regarding room changes, specifically to Shantz 338, and addresses ongoing investigations into refund issues related to room Marshall 480. The notes also highlight resources available through the Penn Treebank, including access via the Linguistic Data Consortium (LDC). Important utility tools like Tregex for pattern matching in parsed trees are discussed, alongside homework expectations regarding NP trace relative clauses. Preparation for a comparative exercise in the next class is required.

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Advanced Computational Linguistics Lecture Notes - January 19th Overview

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  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 Tagging Guide Arpa94 paper Parse Guide

  6. Penn Treebank

  7. Penn Treebank sections 00-24

  8. Penn Treebank

  9. 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

  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. tregex • 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

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