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Apache cTAKES bundles part of lvg 2008, which has a separate copyright 
notice and license terms.  
See ctakes-lvg/src/main/resources/org/apache/ctakes/lvg/data
The license for lvg:
Terms and Conditions for Use of the SPECIALIST NLP Tools
1. Introduction
The following Terms and Conditions apply for use of the SPECIALIST NLP Tools.
Using the SPECIALIST NLP Tools indicates your acceptance of the following 
Terms and Conditions. These Terms and Conditions apply to all SPECIALIST NLP
Tools, independent of format and method of acquisition.
2. The SPECIALIST NLP Tools
The Lister Hill National Center for Biomedical Communications, National
Library of Medicine, National Institutes of Health, Department of Health
and Human Services, has developed the SPECIALIST NLP Tools to investigate
the contributions that natural language processing techniques can make to
the task of mediating between the language of users and the language of
online biomedical information resources. The SPECIALIST NLP Tools facilitate
natural language processing by helping application developers with lexical
variation and text analysis tasks in the biomedical domain.
3. Availability
The SPECIALIST NLP Tools are available to all requesters, both within and
outside the United States, at no charge.
4. Use of the SPECIALIST NLP Tools
a. Redistributions of the SPECIALIST NLP Tools in source or binary form must
include this list of conditions in the documentation and/or other materials
provided with the distribution.
b. In any publication or distribution of all or any portion of the SPECIALIST
NLP Tools (1) you must attribute the source of the tools as the SPECIALIST NLP
Tools with the release number and date; (2) you must state any modifications
made to the SPECIALIST NLP Tools along with a complete description of the
modifications, which may be in the form of patch files.
c. You shall not assert any proprietary rights to any portion of the SPECIALIST
NLP Tools, nor represent the SPECIALIST NLP Tools or any part thereof to anyone
as other than a United States Government product.
d. The name of the U.S. Department of Health and Human Services, National
Institutes of Health, National Library of Medicine, Lister Hill National
Center for Biomedical Communications may not be used to endorse or promote
products derived from the SPECIALIST NLP Tools without specific prior written
permission.
e. Neither the United States Government, U.S. Department of Health and Human
Services, National Institutes of Health, National Library of Medicine, Lister
Hill National Center for Biomedical Communications, nor any of its agencies,
contractors, subcontractors or employees of the United States Government make
any warranties, expressed or implied, with respect to the SPECIALIST NLP Tools,
and, furthermore, assume no liability for any party's use, or the results of
such use, of any part of these tools.
These terms and conditions are in effect as long as the user retains any part
of the SPECIALIST NLP Tools.