Q: "People standing outside in a field." Does this mean that "One person stood outside in the field."?
A: no

Q: "A security person in lime green monitors the busy city streets." Does this mean that "The security person monitors the streets from his patrol car."?
A: it is not possible to tell

Q: "A man and woman in business attire ascend escalator." Does this mean that "Two women are riding an escalator."?
A: no

Q: "A man dressed in black sitting on a park bench by a large banner." Does this mean that "A man is dressed in clothes."?
A:
yes