1. Daily Needs：Food，Clothing，Housing，Transportation
Food
data：Twitter data（Words + location）
skill：tell food good or not
Clothing
data：sales figures + client surveys
skill：give good fashion recommendation recommendations to clients
Housing
data：characteristics of buildings and their energy load
skill：predict energy load of other buildings closely
Transportation
data：some traffic sign images and meanings
skill：recoginize traffic signs accurately
2. Education
data: student‘s records on quizzes on a Math tutoring system
skill: predict whether a student can give a correct answer to another quiz question
3. Entertainment
data: how many users have rated some moves
skill: predict how a user would rate an unrated movie