Q: "A man is kissing a woman on the sidewalk near two bikes while couple is walking a dog." Does this mean that "The man kisses a woman on the sidewalk with two bikes nearby while walking the dog."?
A: yes

Q: "One man plays guitar and another plays the bongos on a brick sidewalk in a city with an open guitar case between them." Does this mean that "the man is a musician"?
A: yes

Q: "A large group of people getting on a train." Does this mean that "People are boarding the train."?
A: yes

Q: "A man in gray trousers is at a counter as a man in woman a farther down the aisle." Does this mean that "The man is waiting at the counter for his friends to pay for their purchases"?
A:
it is not possible to tell