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| First Page | Document Content | |
|---|---|---|
 Date: 2006-07-19 13:27:25Human-based computation game Luis von Ahn Contact Phetch Computer Google Image Labeler Human-based computation Games ESP game |
| First Page | Document Content | |
|---|---|---|
Date: 2006-07-19 13:27:25Human-based computation game Luis von Ahn Contact Phetch Computer Google Image Labeler Human-based computation Games ESP game |
