Q: "Three people are sleeping in a mass-transit vehicle." Does this mean that "There are three humans asleep in a vehicle used for mass-transit."?
A: yes

Q: "A young woman in a blue uniform takes digital photographs while three older woman look on." Does this mean that "A young woman has a blue uniform."?
A: yes

Q: "A large dog holding a smaller dog." Does this mean that "The mother cuddles next to her puppy"?
A: it is not possible to tell

Q: "Two soccer teams playing soccer on a grassy field." Does this mean that "Two rival soccer teams play soccer on the grassy field in the rain."?
A:
it is not possible to tell