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bilibili danmu analysis: data scraper https://github.com/XadillaX/bilibili-subtitles
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vc funding network analysis: data from crunchbase https://www.crunchbase.com/
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open corporate network analysis: data https://opencorporates.com/info/networks
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job posts keyword trend analysis: data http://www.v2ex.com/p/7v9TEc53
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better ui for hacker news comments: http://news.ycombinator.com