Q: "A person with gloves and a welding mask is welding metal in a factory." Does this mean that "A man welds a hockey mask."?
A: it is not possible to tell

Q: "Two people juggle fire sticks in the mud." Does this mean that "Two jugglers throwing knives at each other."?
A: no

Q: "Asian man standing in front of a technology business' sign." Does this mean that "A man is promoting the sign of a business."?
A: yes

Q: "Three boys in swimming trunks walk upstream." Does this mean that "Some boys are in swimwear are walking in the stream."?
A:
it is not possible to tell