Task: Text Simplification
Input (English): historically , the sensations of itch and pain have not been considered to be independent of each other until recently , where it was found that itch has several features in common with pain , but exhibits notable differences.
Output (English): the sensations of itch and pain have not been considered to be not related recently . itch has several features similar to pain . but now it is clear that itch and pain exhibit notable differences.