A man with dreadlocks is riding a skateboard down a street while smiling at the camera.
A skateboarder is doing tricks on the sidewalk.
Just because a man is riding skateboarding and smiling at a camera does not mean the man is doing tricks on the sidewalk.
exists e1 e2 x1 x2 x3 x4 x5.(n_camera(x5) & while(e1,e2) & at(e2,x5) & Actor(e2,x1) & v_smile(e2) & down(e1,x4) & n_street(x4) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_skateboard(x3) & with(x1,x2) & n_dreadlock(x2) & n_man(x1))
exists e1 x1 x2 x3.(n_sidewalk(x3) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & n_skateboarder(x1))