A boy skateboards up a concrete ramp.
The boy is rollerblading.
one is about skateboards while the other is about rollerblading
exists e1 s1 s2 x1 x2.(a_up(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_skateboard(e1) & n_ramp(x2) & a_concrete(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 x1.(n_boy(x1) & Actor(e1,x1) & v_rollerblade(e1))