Q: "A band is playing at a Euro Jazz festival." Does this mean that "There is a band playing."?
A: yes

Q: "A woman carrying a white ball is running behind a small boy." Does this mean that "Both people are in motion."?
A: yes

Q: "Person riding dirt bike on track while others stand by track" Does this mean that "Friends tackle woman on bicycle on dirt track."?
A: no

Q: "Two people, a man and a woman, are handing a man in a pulley contraption a bag." Does this mean that "No humans."?
A:
no