Q: "A child on a red slide." Does this mean that "A child is on a red slide."?
A: yes

Q: "A lady standing on the corner using her phone." Does this mean that "She is inside her house"?
A: no

Q: "A woman is running down the sidewalk talking on her cellphone." Does this mean that "A woman walks down the sidewalk"?
A: no

Q: "Several people are around the steps of a building performing many different activities while wearing white and black clothing." Does this mean that "Several people dressed in black and white are outside of a building."?
A:
yes