Q: "A woman with a white bag is walking upstairs." Does this mean that "A woman is happily walking"?
A: it is not possible to tell

Q: "women in a blue shirt laughing." Does this mean that "women giggling"?
A: it is not possible to tell

Q: "A boy in blue and white on rollerskates holds hockey stick with a black ball at the end of it." Does this mean that "A person on rollerskates."?
A: yes

Q: "a group of policeman in front of a glass building" Does this mean that "A group of policemen are inside a building."?
A:
no