Q: "A thin man talks in front of a seated crowd and explains something with his hands." Does this mean that "A man giving a speech."?
A: it is not possible to tell

Q: "This girl is smiling while she wears a halo of flowers." Does this mean that "This girl is smiling while she wears a halo of flowers"?
A: yes

Q: "There are long, red, padded benches behind the five screens, with only one man there to watch." Does this mean that "There is only one person present."?
A: yes

Q: "Four Asian kids sit on a bench and wave and smile to the camera." Does this mean that "Four Asian kids are waving to the person who is taking pictures."?
A:
it is not possible to tell