As a part of a research, I need to download freely available RDF  (Resource Description Framework -  *.rdf) files via web, as much as possible. What are the ideal libraries/frameworks available in Python for doing this?
Are there any websites/search engines capable of doing this? I've tried Google filetype:RDF search. Initially, Google shows you 6,960,000 results. However, as you browse individual results pages, the results drastically drop down to 205 results. I wrote a script to screen-scrape and download files, but 205 is not enough for my research and I am sure there are more than 205 files in the web. So, I really need a file crawler. I'd like to know whether there are any online or offline tools that can be used for this purpose or frameworks/sample scripts in Python to achieve this. Any help in this regards is highly appreciated.
here's one workaround :
get "download master" from chrome extensions, or similar program
search on google or other for results, set google to 100 per page
select - show all files
write your file extension, .rdf press enter
press download
you can have 100 files per click, not bad.
Crawling web for specific file type