Figure 1.
Information extraction workflow. There are four steps in the information extraction workflow: preprocessing, search, postprocessing, and count. Sub-steps in each step and explanations are also described.
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.