A man riding a bicycle performs a trick above a dirt mound.
The man is doing bicycle tricks.
A man riding a bicycle must be doing bicycle tricks.
exists e1 e2 x1 x2 x3 x4 x5 x6.(Theme(e2,x4) & Actor(e2,x1) & v_perform(e2) & above(x4,x5) & n_mound(x5) & of(x5,x6) & n_dirt(x6) & n_trick(x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_bicycle(x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & of(x2,x3) & n_bicycle(x3))