A man is focusing on a task while standing by a body of water.
A man is swimming in the lake
Swimming and standing are different.
exists e1 e2 x1 x2 x3 x4.(while(e1,e2) & by(e2,x3) & of(x3,x4) & n_water(x4) & n_body(x3) & Actor(e2,x1) & v_stand(e2) & on(e1,x2) & n_task(x2) & Actor(e1,x1) & v_focus(e1) & n_man(x1))
exists e1 x1 x2.(n_lake(x2) & in(e1,x2) & Actor(e1,x1) & v_swim(e1) & n_man(x1))