ACE-2 Version 1.0
| Item Name: | ACE-2 Version 1.0 |
| Author(s): | Alexis Mitchell, Stephanie Strassel, Mark Przybocki, JK Davis, George R. Doddington, Ralph Grishman, Adam Meyers, Ada Brunstein, Lisa Ferro, Beth Sundheim |
| LDC Catalog No.: | LDC2003T11 |
| ISBN: | 1-58563-270-8 |
| ISLRN: | 498-363-793-174-9 |
| DOI: | https://doi.org/10.35111/kcqk-v224 |
| Release Date: | September 02, 2003 |
| Member Year(s): | 2003 |
| DCMI Type(s): | Text |
| Data Source(s): | broadcast news, newswire |
| Project(s): | ACE, GALE, TIDES |
| Application(s): | automatic content extraction, information detection |
| Language(s): | English |
| Language ID(s): | eng |
| License(s): |
LDC User Agreement for Non-Members |
| Online Documentation: | LDC2003T11 Documents |
| Licensing Instructions: | Subscription & Standard Members, and Non-Members |
| Citation: | Mitchell, Alexis, et al. ACE-2 Version 1.0 LDC2003T11. Web Download. Philadelphia: Linguistic Data Consortium, 2003. |
| Related Works: | View |
Introduction
ACE-2 Version 1.0 was developed by the Linguistic Data Consortium (LDC) to support the Automatic Content Extraction (ACE) program. The objective of the ACE program was to develop extraction technology to support automatic processing of source language data (in the form of natural text, and as text derived from ASR and OCR). This included classification, filtering, and selection based on the language content of the source data, i.e., based on the meaning conveyed by the data. Thus the ACE program required the development of technologies that automatically detect and characterize this meaning. ACE research objectives were viewed as the detection and characterization of Entities, Relations, and Events. There were three main ACE tasks: Entity Detection and Tracking, Relation Detection and Characterization, and Event Detection and Characterization.
Annotations for the ACE-2 corpus were produced by LDC to support the Entity Detection and Tracking and Relation Detection and Characterization tasks.
For information regarding the ACE program and ACE technology evaluations administered by the National Institute of Standards and Technology (NIST), visit the NIST website.
For information about ACE annotation and ongoing ACE corpus development, including annotation guidelines, task definitions, annotation tools and other project documentation, see LDC's ACE webpage.
Data
This publication contains two sets of data: training and devtest. Each of these sets is further divided by source: broadcast news, newspaper, and newswire.
The training contains data originally developed as training material for the February 2002 evaluation and again for the September 2002 evaluation. The devtest contains data originally developed as test data for the February 2002 evaluation and later used as devtest data for the September 2002 evaluation.
The broadcast and newswire source data was drawn from a subset of the TDT2 Multilanguage Text Version 4.0 (LDC2001T57); this has been supplemented with additional newspaper data from the Washington Post. A portion of the training broadcast data was drawn from the 1997 English Broadcast News Transcripts (HUB4) corpus (LDC98T28).
All material comes from the first half of 1998. The sources for the broadcast, newswire, and newspaper data are listed below.
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This publication includes both the source data files in .sgm format and the annotation files in ACE Pilot Format (APF), supporting documentation, and version 2.0.1 of the ACE DTD which was used for the September 2002 ACE Evaluation.
There are 179,007 words of source data, or 519 files, broken down as follows:
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Updates
There are no updates available at this time.
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Copyright
Portions © 1998 Los Angeles Times-Washington Post News Service, Inc., © 1998 American Broadcasting Corporation, © 1998 Cable News Network, Inc., © 1998 Press Association, Inc., © 1998 New York Times, © 1998 National Broadcasting Company, Inc., © 1998 Public Radio International, © 2003 Trustees of the University of Pennsylvania"The World" is a co-production of Public Radio International and the British Broadcasting Corporation and is produced at WGBH Boston.