" 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
}
"