Human: How do you get stains out of a white t-shirt? Assistant: 
You can try washing the stain with cold water and then using a detergent specifically designed for removing stains. Alternatively, you could also use a mixture of equal parts baking soda and water to rub over the stain and then rinse it off with warm water. If the stain is still there, you may need to repeat this process several times until the stain is removed.