An aspirin added to the water would preserve the flowers.
The flowers are in water.
aspirin added to water refers that flowers are in water
exists e2 e1 x1 x2 x3 x4.(n_flower(x4) & n_water(x2) & to(e1,x2) & Theme(e2,x4) & Actor(e2,x3) & v_preserve(e2) & (x2 = x3) & Actor(e1,x1) & v_add(e1) & n_aspirin(x1))
exists p1 x1.(n_flower(x1) & exists x2.(in(x1,x2) & n_water(x2)))