Resource: BOLT English SMS/Chat

Reference BOLT English SMS/Chat
Date of Submission Aug. 20, 2018, 4:56 p.m.
Status accepted
ISLRN 204-077-773-055-9
Resource Type Primary Text
Media Type Text
Language English
Format/MIME Type application/xml
Size 179792 KB
Access Medium Web Download


BOLT English SMS/Chat was developed by the Linguistic Data Consortium (LDC) and consists of naturally-occurring Short Message Service (SMS) and Chat (CHT) data collected through data donations and live collection involving native speakers of English. The corpus contains 18,429 conversations totaling 3,674,802 words across 375,967 messages.

The 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.


The data in this release was collected using two methods: new collection via LDC's collection platform and donation of SMS or chat archives from BOLT collection participants. All data collected were reviewed manually to exclude any messages/conversations that were not in the target language or that had sensitive content, such as personal identifying information (PII). All data is presented in UTF-8 XML.


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.

Version 1.0
Creator Jonathan Wright , Zhiyi Song , Stephanie Strassel , Dana Fore , Haejoong Lee
Distributor Linguistic Data Consortium
Rights Holder Portions © 2018 Trustees of the University of Pennsylvania