Goal and options: To sift flour and cornstarch and remove lumps, you can
output answer: Pour the flour and the cornstarch through a metal strainer

Goal and options: How do you cut up a watermelon?
output answer: Slice the watermelon and then trim off the rind and cut remaining watermelon into chunks.

Goal and options: To mix the blueberry smoothie thoroughly
output answer:
Blend all the ingredients with a food processor.