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User-agent: Googlebot-Image
Allow: /ads.txt 

User-agent: Googlebot-Mobile
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User-agent: MSNBot
Allow: /ads.txt 

User-agent: PSBot
Allow: /ads.txt 

User-agent: Slurp
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User-agent: Yahoo-MMCrawler
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User-agent: yahoo-blogs/v3_9
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User-agent: teoma
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User-agent: Scrubby
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User-agent: ia_archiver
Allow: /ads.txt