A boy in an orange snorkel mask swims underwater.
A snorkeling boy looks for coral.
We didn't know why the boy was snorkeling but now we know he is looking for coral specifically.
exists e1 x1 x2 x3 x4 x5.(Theme(e1,x5) & Actor(e1,x1) & v_swim(e1) & n_underwater(x5) & in(x1,x2) & n_mask(x2) & of(x2,x4) & n_snorkel(x4) & of(x2,x3) & n_orange(x3) & n_boy(x1))
exists e2 e1 x1 x2.(for(e2,x2) & n_coral(x2) & Actor(e2,x1) & v_look(e2) & n_boy(x1) & Actor(e1,x1) & v_snorkele(e1))