A guy with glasses taking a photo of a bag with a motorcycle on it.
the guy is rollerblading on the beach
The guy is either taking a photo or rollerblading. He cannot be doing both because you cannot take photos while moving on rollerblades.
exists e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & with(x1,x2) & with(e1,x6) & on(x6,x1) & n_thing(x1) & n_motorcycle(x6) & Theme(e1,x4) & Actor(e1,x3) & v_take(e1) & of(x4,x5) & n_bag(x5) & n_photo(x4) & (x2 = x3) & n_glass(x2) & n_guy(x1))
exists e1 x1 x2.(n_beach(x2) & n_guy(x1) & on(e1,x2) & Actor(e1,x1) & v_rollerblade(e1))