American National Corpus (ANC) Second Release

Item Name: American National Corpus (ANC) Second Release
Author(s): Randi Reppen, Nancy Ide, Keith Suderman
LDC Catalog No.: LDC2005T35
ISBN: 1-58563-369-0
ISLRN: 797-978-576-065-6
Release Date: December 15, 2005
Member Year(s): 2005
DCMI Type(s): Text
Data Source(s): journal articles, news magazine, newswire, telephone speech, varied, web collection
Project(s): American National Corpus (ANC), Talkbank
Application(s): natural language processing
Language(s): English
Language ID(s): eng
License(s): American National Corpus 2nd Release - Open
American National Corpus 2nd Release - Restricted
Online Documentation: LDC2005T35 Documents
Licensing Instructions: Subscription & Standard Members, and Non-Members
Citation: Reppen, Randi, Nancy Ide, and Keith Suderman. American National Corpus (ANC) Second Release LDC2005T35. Web Download. Philadelphia: Linguistic Data Consortium, 2005.
Related Works: View


This file contains documentation on the ANC Second Release, Linguistic Data Consortium (LDC) catalog number LDC2005T35 and ISBN 1-58563-369-0.

The American National Corpus (ANC) project fosters the development of a corpus comparable to the British National Corpus (BNC), covering American English. Corpus-analytic work has demonstrated that the BNC is inappropriate for the study of American English, due to the numerous differences in use of the language.

The availability of a corpus of American English will significantly contribute to language and linguistic research, the development of language understanding computer applications (e.g., language translation and search and retrieval software), and the compilation of reference works such as dictionaries and thesauri. It will also provide a rich national resource for use in education at all levels.

ANC Second Release contains over 20 million words: 10+ million words added in the Second Release, and a new corrected and validated version of the 11 million word ANC First Release. The Second Release also contains software for searching and retrieving multiple stand-off annotations.

ANC Second Release contains texts from the following sources (* denotes new source in the Second Release):

  • Transcribed telephone speech (LDC and Project MORE)
  • The New York Times
  • Berlitz Travel Guides (Langensheidt Publishers)
  • Slate Magazine (Microsoft)
  • ICIC Corpus of Fundraising Texts (Indiana Center for Intercultural Communication)*
  • The Michigan Corpus of Academic Spoken English (MICASE) (University of Michigan, English Language Institute)*
  • Various non-fiction
  • Various fiction (Orin Hargraves, Ferd Eggan)*
  • Various medical research articles (BioMed Central, Public Library of Science)*
  • Anonymized posts to the Phoenix Board/*

ANC Second Release contains data governed under two types of licenses, an open license and a restricted license. Both the Open License Agreement and the Restricted License Agreement need to be signed in order to receive ANC Second Release, and the data must be used in acordance with the agreement by which it is governed.

The ANC will ultimately contain a core corpus of at least 100 million words, including both written and spoken (transcripts) data comparable across genres to the BNC. The genres in the ANC will be expanded to include new types of language data that have become available in recent years, such as web blogs and web pages, chats, email, and rap music lyrics. In addition to the core 100 million words, the ANC will include an additional component of potentially several hundreds of millions of words, chosen to provide both the broadest and largest selection of data possible.

The American National Corpus is being developed with the help of consortium of publishers of American English dictionaries and companies with interests in language processing was formed in 1999. Consortium members are providing materials for inclusion in the corpus, and provided initial financial support for the project.

Additional documentation and information is available at the ANC web site at


For examples of the various types of data in this corpus, please review the files listed below.


The publication of this corpus was facilitated by funding extended by the TalkBank project. TalkBank is an interdisciplinary research project funded by a five-year grant (BCS-98009, KDI, SBE) from the National Science Foundation to Carnegie Mellon University and the University of Pennsylvania.

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