Task: Text Simplification
Input (English): thirdly , for some color blind people , color can only be distinguished if there is a sufficient " mass " of color : thin lines might appear black while a thicker line of the same color can be perceived as having color.
Output (English): some color blind people can only tell the difference between colors if there is a large enough block of color : a thin line might look black while a thicker line of the same color might look like it has color.