In this task the focus is on physical knowledge about the world. Given the provided goal task in the input, describe a process that would lead to the asked outcome. This process often involves physical motions with objects, such as moving them, arranging them in a certain way, mixing them, shaking them, etc. 
One example: How do you remove keys from a computer keyboard for cleaning?
Solution is here: Place the tip of a knife under the corner of a key and gently twist to pop it off.
Explanation: The process of removing keys from a keyboard for cleaning is descriptive and logical.

Now, solve this: wite-out
Solution:
can mark cement with white marks