Goal and options: To get sweat stains out of clothing when washing them,
output answer: soak the clothing in lemon juice before washing them.

Goal and options: How to change the color of a torch light?
output answer: Place a piece of colored film over the head of the torch

Goal and options: How do I unscrew the gas cap to my car?
output answer:
Turn it counter clockwise while gripping the lid in your fingers.