Man skateboarding off of a ramp.
The skateboarder is going off a ramp.
A man skateboarding can be called a skateboarder.
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_skateboarder(x1) & a_off(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_go(e1) & n_ramp(x2))