Q: "A man in a red striped shirt is picking up food off of a rock." Does this mean that "A man is picking up food from a rock."?
A: yes

Q: "Two black men are competing in a marathon." Does this mean that "Two men are competing in a marathon."?
A: yes

Q: "A brown dog is shown standing in the water near a muddy beach." Does this mean that "A dog is covered in mud."?
A: it is not possible to tell

Q: "A man riding on a red bicycle." Does this mean that "A man rides a skateboard."?
A:
no