Man skateboarding off of a ramp.
The cyclist rides up a ramp.
A cyclist does not skateboard.
exists e1 x1 x2 x3.(a_topic(x1) & of(e1,x3) & n_ramp(x3) & r_off(e1) & Actor(e1,x2) & v_skateboard(e1) & (x1 = x2) & n_man(x1))
exists e1 s1 x1 x2.(n_cyclist(x1) & a_up(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_ramp(x2))