diff --git a/README.md b/README.md
index c2f8ed3..c17c320 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,66 @@ To workaround Twitter's rate limits, ``tweetf0rm`` can spawn multiple crawlers e
 
 It's quite stable for the things that I want to do. I have collected billions of tweets from **2.8 millions** twitter users in about 2 weeks with a single machine.
 
+Dataset
+------------
+Twitter license (or at least the company's position on this) does not allow me redistribute the crawled data (e.g., someone asked the question a while back: https://dev.twitter.com/discussions/8232). But, here is what I have:
+
+* Health topics: I crawler tweets of 2,686,823 users' tweets (i.e., as of 11/12/2013; maximum of 3,200 per user, limitted by Twitter apis) in a matter of two weeks. All thhese twitter users follow one of the following, what I call, health-related information centers (i.e., person or organization who share health-related information, such as the [CNNHealth](https://twitter.com/cnnhealth). Note that, some of the users either haven't posted anything or have set the privacy setting to private, so it will show zero tweets for these users. Anyway, I haven't done anything to this dataset yet besides doing some pre-processing (indexing, calculate common statistics), although I have some research ideas that I am planning to try. If you want to get a hand on this dataset (either collaborate with me or just want the data), contact me at [Jiang Bian](jbian@uams.edu) :). The detailed stats such as how many tweets will be posted as soon as my code gets them calculated. 
+  
+  * https://twitter.com/RWJF
+  * https://twitter.com/samhsagov
+  * https://twitter.com/PublicHealth
+  * https://twitter.com/WebMD
+  * https://twitter.com/NIMHgov
+  * https://twitter.com/HHSGov
+  * https://twitter.com/drsanjaygupta
+  * https://twitter.com/womenshealth
+  * https://twitter.com/HealthHabits
+  * https://twitter.com/medlineplus
+  * https://twitter.com/KHNews
+  * https://twitter.com/NIH
+  * https://twitter.com/cnnhealth
+  * https://twitter.com/DrOz
+  * https://twitter.com/projecthopeorg
+  * https://twitter.com/NBCNewsHealth
+  * https://twitter.com/LIVESTRONG
+  * https://twitter.com/JohnsHopkinsSPH
+  * https://twitter.com/CDC_eHealth
+  * https://twitter.com/healthfinder
+  * https://twitter.com/FamHealthGuide
+  * https://twitter.com/AmericanCancer
+  * https://twitter.com/HealthCareGov
+  * https://twitter.com/goodhealth
+  * https://twitter.com/CDCemergency
+  * https://twitter.com/Disc_Health
+  * https://twitter.com/HarvardHealth
+  * https://twitter.com/Health_Affairs
+  * https://twitter.com/WomensHealthMag
+  * https://twitter.com/latimeshealth
+  * https://twitter.com/FDA_Drug_Info
+  * https://twitter.com/nytimeshealth
+  * https://twitter.com/MayoClinic
+  * https://twitter.com/AIDSgov
+  * https://twitter.com/NPRHealth
+  * https://twitter.com/USDAFoodSafety
+  * https://twitter.com/DailyHealthTips
+  * https://twitter.com/MinorityHealth
+  * https://twitter.com/RedCross
+  * https://twitter.com/FDAWomen
+  * https://twitter.com/WSJhealth
+  * https://twitter.com/runnersworld
+  * https://twitter.com/bbchealth
+  * https://twitter.com/CMSGov
+  * https://twitter.com/AmerMedicalAssn
+  * https://twitter.com/KatherineHobson
+  * https://twitter.com/MensHealthMag
+  * https://twitter.com/FDArecalls
+  * https://twitter.com/WSJhealthblog
+  * https://twitter.com/CDCgov
+  * https://twitter.com/WHO
+  * https://twitter.com/GoHealthyPeople
+  * https://twitter.com/CDCFlu
+  * https://twitter.com/girlshealth
 
 Installation
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