Q: "A man and a woman standing near a desk while another woman sits at the desk looking through a microscope." Does this mean that "Three scientists are researching something with a microscope."?
A: it is not possible to tell

Q: "A small child in a green shirt brushes his teeth in the restroom while a woman behind him is taking a picture of the child." Does this mean that "They are in a public restroom."?
A: it is not possible to tell

Q: "A girl putting food into her mouth while a boy looks at her." Does this mean that "The eating girl is eating the boy's food."?
A: it is not possible to tell

Q: "A woman in a white shirt standing on a street" Does this mean that "There is a woman in a white shirt outside"?
A:
yes