Goal and options: To cool down your coffee without watering it down,
output answer: place a few cubes of frozen coffee into your mug.

Goal and options: how to identify orions belt
output answer: . If you go outside and look south to southeast before dawn now, you'll notice Orion's Belt, which consists of a short, straight row of medium-bright stars. Just draw a line through Orion's Belt and extend that line toward the horizon. You'll easily spot Sirius, the sky's brightest star.

Goal and options: how to get rid of yellow stains
output answer:
mix cup salt and cup baking soda with 1 gallon water in a large cooking pot. Add the yellowed items and boil for 1 hour.