Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Sample sentence and token-level annotation using the BIO (Beginning, Inside, Outside) scheme. The left- most column shows the tokens, the Annotation column shows the token-level annotations, and the four columns on the right show four sample features and their representations. For multi-word named entities, the first token is given the B tag and all the following tokens are given the I tag. All other tokens are given the O tag, indicating that they do not belong to any toponyms.
