Q: "The woman wearing the pink jacket has thrown a Frisbee for the dog to catch." Does this mean that "A dog chases a frisbee."?
A: it is not possible to tell

Q: "Woman with blond-hair singing into a microphone." Does this mean that "A person is performing a song."?
A: yes

Q: "Two mechanics examining the engine of a stock car with the body raised." Does this mean that "Two people are working on a car."?
A: yes

Q: "A young girl wearing a striped skirt and fancy sandals poses for a picture." Does this mean that "The boy is posing for a picture."?
A:
no