Man in fedora, white shirt, and black jeans, grinding on a skateboard.
A man grinds on a skateboard.
The man is described in the first sentence as grinding on a skateboard. The only words relevant to sentence 1 in sentence 2 are the three highlighted ones.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(a_topic(x1) & rel(x1,x3) & rel(x3,x4) & on(e1,x6) & n_skateboard(x6) & Actor(e1,x5) & v_grind(e1) & (x4 = x5) & n_jeans(x4) & a_black(s2) & Theme(s2,x4) & n_shirt(x3) & a_white(s1) & Theme(s1,x3) & in(x1,x2) & n_fedora(x2) & n_man(x1))
exists e1 x1 x2.(on(e1,x2) & n_skateboard(x2) & Actor(e1,x1) & v_grind(e1) & n_man(x1))