Q: "An employee serving a group at a restaurant." Does this mean that "An employee is not enough to serve a group."?
A: it is not possible to tell

Q: "Man sitting at the end of a row of green chairs by some payphones." Does this mean that "A person is seated."?
A: yes

Q: "A man with long hair wearing gray clothes and a backpack." Does this mean that "Birds are dancings"?
A: no

Q: "A surfer blazes on a roaring wave." Does this mean that "the surfer rides the waves on his birthday"?
A:
it is not possible to tell