Submissions are evaluated on [area under the ROC curve](http://en.wikipedia.org/wiki/Receiver_operating_characteristic) between the predicted probability and the observed target.

## Submission Format
For every Comment in the dataset, submission files should contain two columns: id and target. target should have a value between 0 and 1.

The file should contain a header and have the following format:
```
Id,Predicted
0,0.9
1,0.1
2,0.5
etc.
```