Male singer crowd surfing
A singer is riding a surfboard.
One is crowd surfing (at a concert) and the other is surfing (on an ocean)
exists s1 x1 x2 x3.(n_surfing(x1) & of(x1,x3) & n_crowd(x3) & of(x1,x2) & n_singer(x2) & a_male(s1) & Theme(s1,x1) & a_topic(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_surfboard(x2) & n_singer(x1))