A man is on the ground while a person on a skateboard talks to them.
A man on a skateboard checks to see if a man on the ground is ok.
A man is on the ground while a person on a skateboard talks to them does not indicate that a man on a skateboard checks to see if a man on the ground is ok. does not mean that he checks to see if a man on the ground is ok.
exists p1 x1 x2 x3 x4 x5.(n_ground(x5) & while(p1,x2) & to(x2,x1) & n_thing(x1) & on(x2,x3) & n_talk(x3) & of(x3,x4) & n_skateboard(x4) & n_person(x2) & on(x1,x5) & n_man(x1))
exists p1 x1 x2 x3 x5.(n_ground(x5) & a_topic(x1) & Topic(x1,p1) & exists e1 p2.(Topic(e1,p2) & Actor(e1,x1) & v_see(e1) & exists p3 x4.(exists x6.((x4 = x6) & n_ok(x6)) & on(x4,x5) & n_man(x4))) & on(x1,x2) & n_check(x2) & of(x2,x3) & n_skateboard(x3) & n_man(x1))