" Input: { (lst) - list of expeirments (skip_meta_key) - if 'yes', do not use 'meta' key in list (selector) - dict with selector (crowd_key) - extend selector keys if called from crowd-tuning (original_input) - original (high-level) input from web to check keys (keep_empty) - if 'yes', keep empty values } Output: { return - return code = 0, if successful > 0, if error (error) - error text if return > 0 choices wchoices } "