Q: "A lady is chasing after a little boy." Does this mean that "the lady is running"?
A: yes

Q: "Two people play guitars on a stage next to other musical equipment." Does this mean that "Two guitar players are auditioning next to the other auditioners stuff."?
A: it is not possible to tell

Q: "The brown dog with the white chest is carrying a ball." Does this mean that "The dog is sleeping in the grass."?
A: no

Q: "A child wearing a white, red, and black life jacket was bounced into the air by something big and yellow." Does this mean that "A kid bounces off a a yellow inflatable thing."?
A:
it is not possible to tell