Focused crawls are collections of frequently-updated webcrawl data from narrow (as opposed to broad or wide) web crawls, often focused on a single domain or subdomain.
This is the implementation of AFSC focused website segment crawler. It is capable for finding web pages that are related to a specific topic and also written in a specific language. For more details, please refer to http://ieeexplore.ieee.org/abstract/document/7789756/