A person is fishing at sunset.
Someone is rowing a boat across a lake.
fishing and rowing are two different activities
exists e1 x1 x2.(at(e1,x2) & n_sunset(x2) & Actor(e1,x1) & v_fish(e1) & n_person(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_row(e1) & across(x2,x3) & n_lake(x3) & n_boat(x2) & n_person(x1))