Kids jump their bikes off of dirt ramps near a waterfront.
Funny human jumping
Funny human does not imply necessarily to be kids only. He can be an adult.
exists e1 x1 x2 x3 x4 x5.(of(e1,x3) & near(x3,x5) & n_waterfront(x5) & n_ramp(x3) & of(x3,x4) & n_dirt(x4) & r_off(e1) & Theme(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_bike(x2) & of(x2,x1) & n_thing(x1) & n_kid(x1))
exists s1 x1 x2.(n_jump(x1) & a_human(s1) & Theme(s1,x1) & (x1 = x2) & ne_nam_funny(x2) & a_topic(x1))