Q: "An adult and two small children playing in a fountain." Does this mean that "they are having fun"?
A: it is not possible to tell

Q: "Two people wearing elaborate costumes pose in front of a bike." Does this mean that "The people wearing fancy dress"?
A: yes

Q: "Someone is running on a track at sunset." Does this mean that "A person runs on the track."?
A: yes

Q: "Three asian children, 2 boys and a girl, is sitting and studying in a classroom that is painted light green." Does this mean that "The children are not paying attention and running around the colorful room."?
A:
no