The tasks are formulated in the form of surveys. The survey consists of commands, e.g. single choice, take a photo, enter text, enter a number, enter a date, etc.The task completed by the Contractor is sent to the Evaluator. The evaluator may accept the answers or return them for correction. In the event of a return for correction, the Contractor will edit the previously provided answers. Corrected answers go back to the Evaluator and may be accepted or returned again.