def get_values_for_schema(elements, schema):
return [element['<STR_LIT:value>'] for element in elements if element['<STR_LIT>'] == schema]<EOL>
Return all values from elements having a given schema.

    Args:
        elements(Iterable[dict]): an iterable of elements, which are all dicts
            having at least the ``schema`` and ``value`` keys.
        schema(str): the schema that the values need to follow.

    Returns:
        list: all values conforming to the given schema.

    Example:
        >>> elements = [
        ...     {'schema': 'TWITTER', 'value': 's_w_hawking'},
        ...     {'schema': 'WIKIPEDIA', 'value': 'Stephen_Hawking'}
        ... ]
        >>> get_values_for_schema(elements, 'TWITTER')
        ['s_w_hawking']