A man does tricks with his bicycle in a skate park.
A cyclist shows off to the kids in the new skate park.
A man doing tricks on a bicycle may not be doing so so that he shows off. Also he may not be showing anything to the kids, as a park doesn't always imply the presence of children.
exists e1 x1 x2 x3 x4 x5.(in(e1,x4) & n_park(x4) & of(x4,x5) & n_skate(x5) & with(e1,x3) & n_bicycle(x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & n_man(x1))
exists e1 s1 s2 x1 x2 x3 x4.(n_park(x3) & of(x3,x4) & n_skate(x4) & a_new(s1) & Theme(s1,x3) & n_kid(x2) & a_off(s2) & Manner(e1,s2) & to(e1,x2) & in(x2,x3) & Actor(e1,x1) & v_show(e1) & n_cyclist(x1))