A system includes: a memory operable to store a predictive model; a first processor communicatively coupled to the memory, the first processor operable to execute the predictive model to perform operations including generating knowledge score metrics based on a set of attributes for individuals included in a specified population, where the knowledge score metrics quantify a prediction of a capability of an individual for performing metadata labeling; a second processor communicatively coupled to the memory and the first processor, the second processor is operable to perform operations including comparing the knowledge score metrics to a specified threshold, and identifying attributes of individuals from a specified population having knowledge score metrics exceeding the specified threshold as attributes of individuals capable of performing metadata labeling.