A skateboarder in a white shirt and helmet slides sideways on a street.
A human sliding
A skateboarder is human.
exists s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(x1,x2) & subset_of(x4,x2) & n_sideways(x4) & on(x4,x6) & n_street(x6) & n_slide(x4) & of(x4,x5) & n_helmet(x5) & subset_of(x3,x2) & n_shirt(x3) & a_white(s1) & Theme(s1,x3) & n_skateboarder(x1))
exists s1 x1.(a_topic(x1) & n_slide(x1) & a_human(s1) & Theme(s1,x1))