A couple sitting on rocks looking out at the ocean.
A couple on rocks watching the ocean.
A couple on rocks watching the ocean implies the couple is sitting .
exists e2 e1 s1 x1 x2 x3 x4.(n_ocean(x4) & a_topic(x1) & for(e1,e2) & a_out(s1) & Manner(e2,s1) & at(e2,x4) & Actor(e2,x2) & v_look(e2) & on(e1,x3) & n_rock(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_couple(x1))
exists e1 x1 x2 x3 x4.(n_ocean(x4) & a_topic(x1) & Theme(e1,x4) & Actor(e1,x3) & v_watch(e1) & (x1 = x3) & on(x1,x2) & n_rock(x2) & n_couple(x1))