Q: "A masked doctor wearing glasses is performing a surgery." Does this mean that "The doctor is inside"?
A: yes

Q: "Two couples, two men and two women, dancing on a stage wearing all yellow." Does this mean that "People are performing a show on stage."?
A: it is not possible to tell

Q: "A man wearing a backpack is climbing a rock." Does this mean that "A man is not wearing a backpack."?
A: no

Q: "Three young girls in white dresses run towards a fountain." Does this mean that "Two girls are sitting around a fountain while one runs to catch up."?
A:
no