13. One or more computer-readable media storing computer-executable instructions that, when executed on one or more processors, cause the one or more processors to perform acts comprising: selecting a set of elements having a sample selection bias from a group of elements for labeling by one or more human users, the selecting based at least in part on a sample selection bias of the set of elements; receiving a label for each element of the set of elements from the one or more human users; and training a model for predicting labels for each element of the group of elements, the training based at least in part on the labels for the set of elements received from the one or more human users.
13. One or more computer-readable media storing computer-executable instructions that, when executed on one or more processors, cause the one or more processors to perform acts comprising: selecting a set of elements having a sample selection bias from a group of elements for labeling by one or more human users, the selecting based at least in part on a sample selection bias of the set of elements; receiving a label for each element of the set of elements from the one or more human users; and training a model for predicting labels for each element of the group of elements, the training based at least in part on the labels for the set of elements received from the one or more human users. 18. One or more computer-readable media as recited in claim 13 , wherein the selecting of the set of elements is also based at least in part on an uncertainty of each element of the set of elements.