A baby is sitting on a floor and holding a vacuum cleaner hose.
The baby sits on the floor
Baby sits on floor in both sentences, but the first sentence just gives some extra information.
exists e1 e2 x1 x2 x3 x4 x5 x6.(Theme(e2,x4) & Actor(e2,x3) & v_hold(e2) & n_hose(x4) & of(x4,x6) & n_cleaner(x6) & of(x4,x5) & n_vacuum(x5) & n_baby(x3) & on(e1,x2) & n_floor(x2) & Actor(e1,x1) & v_sit(e1) & n_baby(x1))
exists e1 x1 x2.(n_floor(x2) & n_baby(x1) & on(e1,x2) & Actor(e1,x1) & v_sit(e1))