Q: "Two women and two children sit at a bus stop." Does this mean that "People are sitting down"?
A: yes

Q: "Two people wearing uniforms and carrying bags are walking down the street with a wall in the background." Does this mean that "Two people are carrying bags for airline passengers."?
A: it is not possible to tell

Q: "Girl in polka dot cap swimming." Does this mean that "The girl is happy."?
A: it is not possible to tell

Q: "A man in a brown vest and glasses plays with a brown dog." Does this mean that "A man relaxing with his cat."?
A:
no