1. Building an annotated Corpus
David Ling

2. Contents Error annotation tool – UIUC 2010 Brat -- 2012
WAMP – NUS 2013
Conclusion – build our own tool

3. Error annotation tool http://cogcomp.org/page/tools_vi ew/17
Web-based PHP
Sentence-based annotation
Old version PHP
many errors during implementation

4. BRAT http://brat.nlplab.org Common NLP annotating tool
Free available online
web-based, cgi
Named entity recognition
Part-of-speech
Not for error annotation

5. WAMP Building a Large Annotated Corpus of Learner English, NUS 2013
In-house, Web-based
Guidelines: select minimum span that is necessary to correct the error
Functions:
Essay browser
Users system
Annotation

6. Conclusions Develop our own tool for data collection TO DO
Not difficult
Implement and modify others also time consuming and difficult
Taylor-made for our setting
Compatible to our grammar checker/ assistant in the future
TO DO
Setup a PHP+ SQL database (working,
Annotation interface (nearly done)