Q: "Man holding a sign supporting the troops" Does this mean that "A man supports the troops with his sign."?
A: yes

Q: "Two adults and a little boy sit on a homey exterior porch in front of an exotic flora and fauna nature scene." Does this mean that "Several people are sitting outside."?
A: yes

Q: "An old man is standing in front of an ad on the sidewalk." Does this mean that "An old grey haired man is standing in front of an ad on the sidewalk."?
A: it is not possible to tell

Q: "A number of people are doing a synchronized martial arts performance in the street." Does this mean that "A group of people are performing martial arts."?
A:
yes