BOLT Egyptian-English Word Alignment -- Discussion Forum Training

Item Name: BOLT Egyptian-English Word Alignment -- Discussion Forum Training
Author(s): Xuansong Li, Katherine Peterson, Stephen Grimes, Stephanie Strassel
LDC Catalog No.: LDC2019T06
ISBN: 1-58563-881-1
ISLRN: 969-111-040-293-0
Release Date: April 15, 2019
Member Year(s): 2019
DCMI Type(s): Text
Data Source(s): discussion forum
Project(s): BOLT
Application(s): automatic content extraction, machine translation
Language(s): Egyptian Arabic, English
Language ID(s): arz, eng
License(s): LDC User Agreement for Non-Members
Online Documentation: LDC2019T06 Documents
Licensing Instructions: Subscription & Standard Members, and Non-Members
Citation: Li, Xuansong, et al. BOLT Egyptian-English Word Alignment -- Discussion Forum Training LDC2019T06. Web Download. Philadelphia: Linguistic Data Consortium, 2019.
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BOLT Egyptian-English Word Alignment -- Discussion Forum Training was developed by the Linguistic Data Consortium (LDC) and consists of 400,448 words of Egyptian Arabic and English parallel text enhanced with linguistic tags to indicate word relations.

The DARPA BOLT (Broad Operational Language Translation) program developed machine translation and information retrieval for less formal genres, focusing particularly on user-generated content. LDC supported the BOLT program by collecting informal data sources -- discussion forums, text messaging and chat -- in Chinese, Egyptian Arabic and English. The collected data was translated and annotated for various tasks including word alignment, treebanking, propbanking and co-reference.


This release consists of Egyptian source discussion forum threads harvested from the Internet by LDC using a combination of manual and automatic processes. The source data is released as BOLT Arabic Discussion Forums (LDC2018T10).

The BOLT word alignment task was built on treebank annotation. Specifically, Egyptian source tree tokens for word alignment were automatically extracted from tree files of BOLT Egyptian Arabic Treebank annotation on the source discussion forum data harvested by LDC. Human annotators then followed LDC guidelines to link words and phrases in Arabic to those in English.

The data profile broken down by character tokens, tree tokens and segments appears below:

Language Genre Files Words Tree-tokens Segments
Egyptian Arabic discussion forum 724 400,448 593,723 31,454


This material is based upon work supported by the Defense Advanced Research Projects Agency (DARPA) under Contract No. HR0011-11-C-0145. The content does not necessarily reflect the position or the policy of the Government, and no official endorsement should be inferred.


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