Q: "A musical concert with a guitar." Does this mean that "The guitar is the focus of this concert."?
A: yes

Q: "Girl in a gray tank top and sunglasses looking to the right." Does this mean that "The girl in a gray top and sunglasses is looking to the right out the window."?
A: it is not possible to tell

Q: "A girl, a boy, and a woman looking in the same direction." Does this mean that "A family looks at a hot air balloon."?
A: it is not possible to tell

Q: "A middle-aged man is standing outside of a building while looking at his phone." Does this mean that "A man is looking at his phone."?
A:
yes